[[quoteright:350:http://static.tvtropes.org/pmwiki/pub/images/ddf1c7b5a7f51f3f26c3cb57c3985d2b.jpg]]
[[caption-width-right:350: (Top right clockwise) Seunghyun, Minhwan, Jonghun, Hongki, Jaejin.]]

A [[KoreanPopMusic South Korean idol rock band]], FT Island, short for Five Treasure Island, was the first group to debut under FNC Entertainment (FNC Music at the time) in 2007. The original lineup comprised Jonghun, Hongki, Jaejin, Wonbin and Minhwan; Seunghyun was added in after Wonbin left at the beginning of 2009 for "musical differences".

They became the Power Rookies of 2007, winning a lot of awards for their song "Lovesick" including their first music show win after a mere 53 days. They also made their indie debut in Japan in 2008 before making their major debut in 2010. There, too, they have also found good success, with their singles charting high constantly and getting sold out Japanese concerts and tours.

They have also branched out into other areas such as musicals and acting, with Hongki in particular being a well-known idol actor. Additionally, the subunit FT Triple - comprising Jaejin, Minhwan and Jonghun - formed in 2008 and officially promoted in 2009 with "Love Letter". Seunghyun is also in a subunit called Two Song Place with labelmate and comedian Song Eunyi, and they made their debut in 2014 with "Age Height".

Despite their ups and downs throughout the years, they remain as one of the most popular idol bands in Korea. They are known for being one of the few bands in the idol scene, Hongki's acclaimed vocals, their impressive instrumental skills, their heartwrenching rock ballads and their increasingly genuine and likeable personalities. They are working their way into becoming real artists as they write more of their own songs and pursue their desired sound.

[[foldercontrol]]

[[folder: Members]]
* Choi Jonghun: leader, lead guitarist and keyboardist. Also the keyboardist and guitarist in FT Triple.
* Lee Hongki: main vocalist, oldest and the face.
* Lee Jaejin, the bassist, subvocalist and sub-rapper. Also the vocalist and guitarist in FT Triple.
* Song Seunghyun: main rapper, subvocalist and rhythmic guitarist. The second maknae.[[note]]As the last member to join, he is technically entitled the official "maknae" status, but youngest member Minhwan still officially holds the title so as to avoid confusion.[[/note]] He replaced former member Oh Wonbin in early 2009. Also the rapper-half of FNC subunit Two Song Place.
* Choi Minhwan: drummer and maknae[[note]]youngest member[[/note]]. Also the drummer in FT Triple.[[/folder]]

[[folder: Former member]]
* Oh Wonbin: former main rapper, subvocalist and rhythmic guitarist, and also played the harmonica. He left FT Island at the start of 2009 for "musical differences". Later became a soloist under FNC and briefly promoted in Korea and Japan before eventually leaving to join another company to focus on acting.[[/folder]]

[[folder: Discography]]
Korean Discography:
* ''Cheerful Sensibility'' (2007)
** ''The Refreshment'' (2007) (repackaged album)
* ''Colorful Sensibility'' (2008)
** ''Colorful Sensibility Part 2'' EP (2008)
* ''Jump up''[[note]]their first release with Seunghyun[[/note]] (2009) (EP)
* ''[[NewSoundAlbum Cross and Change]]'' (2009)
** ''Double Date''[[note]]also contains subunit FT Triple's songs[[/note]] (2009) (repackaged album)
* ''Beautiful Journey'' (2010) (EP)
* ''Return'' (2011) (EP)
* ''Memory in FTISLAND'' (2011) (cover album) (EP)
* ''Grown Up'' (2012) (EP)
* ''Five Treasure Box'' (2012)
* ''[[MeaningfulName Thanks To]]'' (2013) (EP)
* ''The Mood'' (2013) (EP)
* ''Japan Best - All About'' (2014) (a non-promoted album which consists of Korean versions of selected Japanese songs, and was made a "present" for their fans)
* ''I WILL'' (2015)

Japanese Discography (singles listed under respective albums):
* ''Prologue to FT Island'' (2008)
* ''So Long, Au Revoir'' (2009)
** ''The One''[[note]]their last release with Wonbin[[/note]] (2008), ''I Believe Myself'' (2009), ''Raining''[[note]]"Everything Is Impossible" is an FT Triple song[[/note]] (2009)
* ''[[SelfTitledAlbum Five Treasure Island]]'' (2011) (first major album)
** ''Flower Rock'' (2010), ''Brand New Days'' (2010), ''So Today'' (2010), ''[[Manga/{{Toriko}} Satisfaction]]'' (2011)
* ''[[MeaningfulName 20 [twenty]]]'' (2012)
** ''Let it go!'' (2011), ''Distance'' (2011), ''[[Anime/{{Ozuma}} Neverland]]'' (2012)
* ''RATED-FT'' (2013)
** ''Top Secret'' (2012), ''Polar Star'' (2012), ''You Are My Life'' (2013)
* ''[[MeaningfulName New Page]]'' (2014)
** ''[[Manga/{{Toriko}} Theory of Happiness]]'' (2013), ''Beautiful'' (2014), ''Mitaiken Future'' (2014)
* ''5.....GO'' (2015)
** ''To The Light'' (2014)

... [[UpToEleven And that's not counting solos, OSTs, special songs etc.]]
[[/folder]]
----
!!This band provides examples of:
[[folder:A-M]]
* AerithAndBob:
** Seunghyun's guitars are called Akugii, Guitar 1, Guitar 2 etc., Jonghun calls his guitars Girlfriend 1, Girlfriend 2 etc., Minhwan's calls his drums his rival, Hongki calls his microphone his girlfriend. Amongst all these odd choices of instrument petnames is one of Jaejin's basses whom he calls... Chris.
** In their alternate ego group SF Heroes [[RetCon (the dance group anyways)]] there's the usual Hongki, Minhwan, Jonghun and Seunghyun... and then there's their sole Chinese member Zaizhen (aka Jaejin's alias).
* AffectionateNickname: Members are sometimes or used to be referred to by certain affectionate nicknames from other members or friends, and fans also use most of them. Also see FanNickname for nicknames coined by fans.
** Hongstar and Cute Rebellion for Hongki.
** MBC (Margarine Butter Cheese)[[note]]denotes how awkward Jonghun can be[[/note]], Hoonie/Funi and Funi-sama for Jonghun.
** Jaejinnie, Jinnie, Black Goat and Goat (see AnimalMotifs) for Jaejin.
** Minari and Minani for Minhwan.
** Songsari and 16-Dimensions (see {{Cloudcuckoolander}}) for Seunghyun.
* AlbumIntroTrack: ''I WILL'' has a short unnamed opening track which is predominantly piano.
* AllDrummersAreAnimals: Minhwan can sure drum like one, but he's otherwise [[AvertedTrope the quieter, youngest and saner member]].
* AnimalMotifs: Jaejin frequently associated with goats by members, himself and fans because he eats like one.
* AnimeThemeSong: "Satisfaction" for the ''Manga/{{Toriko}}'' ED, "Neverland" for the ''Anime/{{Ozuma}}'' OP, and "Theory of Happiness" for the ''Toriko'' movie ED.
* AscendedExtra:
** Jaejin singing-wise; he didn't sing in their songs at all until some brief verses in "The Cool vs The Pretty". 2009 onwards he became the subvocalist and sings the most after Hongki.
** Seunghyun and Music/CNBlue's Jonghyun were in an advertisement promoting FNC Academy predebut.
** The members' fake identities/alter egos from the "Flower Rock" MV went on to become SF Heroes and appeared in two Japanese tours,[[RetCon except with different names and music each time]].[[note]]First they were a band as S-Men/Seunghyun, Men/Minhwan, X-Men/Hongki, Ramen/Jonghun and Amen/Jaejin, next they were a dance group with the members retaining their original names... except for Zaizhen/Jaejin.[[/note]]
** Jonghun was a very well-known ulzzang predebut.
** Hongki was a mildly known child actor prior to FTI.
* AudienceParticipationSong: Many of their songs become this at one point with the group often incorporating talks and other small activities during songs and encouraging fans to sing along at certain points. In particular there's:
** "I Hope" - it's common for them to stop playing after Jonghun's guitar solo, so Hongki can talk to the audience and make them sing the chorus acapella with him before everyone continues playing.
** "Flower Rock" - expect Hongki to make the audience sit down/stand up after the bridge. Several times.
* BigLittleBrother: Seunghyun's the second youngest (and not by much) yet also the tallest at over 180cm[[note]]his official profile says 180cm but Hongki's confirmed that he's grown taller since then.[[/note]]
* BreakupSong: A good deal of their ballads mourn about heartbreak, from hit debut song "Lovesick" to the later "Madly".
* BoyBand: They don't like this label due to the connotations and limitations it holds, but it's true. However, unlike most others who are a dance group, they specialise in instruments.
* TheCameo:
** The rest of the group (when Wonbin was a member) once cameo'd as Jaejin's character's obnoxious camp friends (aka "[=FT4=]") in ''[[https://www.youtube.com/watch?v=t4Akb3lUl98 Unstoppable Marriage]]''.
** Hongki and Jonghun, as well as the rest of their Chocoball group, took part in [[Music/SuperJunior Heechul]] and Music/{{Trax}}'s Jungmo's MV for their subunit song "Close Ur Mouth".
** Hongki cameo'd in an episode of ''Series/MyGirlfriendIsANineTailedFox'' as [[Series/YouAreBeautiful Jeremy]].
** All members had a ''very'' brief cameo, speaking one line each, in the ''Toriko'' movie [[http://youtu.be/k9s8nqzIKB8?t=4m55s within the first 5 minutes]] when they were about to perform at a concert.
* CantHoldHisLiquor: Not so much that he can't handle it, but Hongki is prone to crying a lot when drunk.
* TheCastShowOff: "I'm Happy" features a good deal of Wonbin playing the harmonica, which he otherwise never got to play in his time with FTI even though he used it in his audition for FNC.
* ChickMagnet: All of them are quite popular with girls. But there's Jonghun in particular, whose good looks has gotten many admirers even from those not in the fandom.
* {{Cloudcuckoolander}}: Everyone's minds work rather strangely, but the biggest one is Seunghyun. His nickname is "16-Dimensions", meaning he operates on a completely different plane of existence. Watching his Good Morning Bob series is enough evidence - they range from him talking to inanimate objects to him enacting a love story between an Angry Bird and a teddy bear.
* ChivalrousPervert: They are a hit with the ladies, love the ladies and think very well of the ladies. They don't hide their perverted sides which range from Hongki always jokingly (probably) asking Primadonnas to wear bikinis to their concert to Seunghyun talking about having "sexual urges" more than once at Japanese concerts. However they're quite respectful to females too whether it be their female fanbase or fellow female workers. An example includes Jaejin denying Hongki's joke that Jaejin dumps a girl as soon as he's sick of her and exclaiming, "Women are not objects! Donít scold my woman!"
* CoverAlbum: ''Memory In FT Island'' comprises their renditions of old Korean hits.
* CrosscastRole: Purposely invoked as RuleOfFunny in parodies and variety show "acting" gigs when a girl is needed.
** In their first concert in Thailand, Hongki rapped with a girl singer for his solo. Halfway through the performance footage on the DVD it's shown that the girl [[TheReveal turned out]] to be Jonghun lipsyncing and in drag.
** Hongki along with others from the ''Series/YouAreBeautiful'' cast did a parody of Music/GirlsGeneration's "Genie" which meant crossdressing the guys. Hongki was very likely parodying Jessica.
** Jaejin and Seunghyun are the ones subject to this the most, such as their Hangul Live episodes where either of them ''will'' be the girl if there has to be one. Lampshaded by Jaejin in their ''Series/BoysBeforeFlowers'' parody where he walks into F4's room and [[BreakingTheFourthWall wonders which guy he is]]... then he realizes he's in a girls uniform and cries (in English), "Geum Jandi? Tell me why!"
* TheCutie: Minhwan, especially at debut when he was really young. His aegyo and adorable and innocent personality and looks won many nuna hearts. Mostly averted after maturing - he's not as naive and can't pull off aegyo anymore, but fans still see him as this due to him being the smallest and youngest member with a simple happy-go personality.
* CuteBruiser: Minhwan, the youngest, smallest and cutest member... once won an arm-wrestling competition with all the 2PM members, aka the "Beast Idols".
* DaddysGirl: A few variants stated by Hongki himself with a few of his pets (of course all the members dote on their pets ''very much''; see FriendToAllLivingThings):
** Hongki used to call his old pet husky, Elysia, his daughter.
** For the ''Five Treasure Album'' jacket shooting, members were supposed to have their solo photos taken with their "treasures". Hongki promptly took his solo with three of his dogs, two who appear to be his female ones Pri and Madonna.
* DarkerAndEdgier: Their concepts are prone to taking a darker turn, such as promoting a ballad after having promoted a happier or poppier song (which often by default means a depressing or edgy MV following a more pleasant MV). In particular there's
** The relatively dark (and confusing) MV for "Hello Hello" which followed the happier "I Hope" and melancholy "Love Love Love" [=MVs=]. Hongki's [[spoiler:implied to be a ghost and dead from since the very start]], and he tries to save his fellow members who are stuck in a burning building, which is surrounded by news reporters and the fire brigade.
** The PV for Japanese album promotion track [[https://www.youtube.com/watch?v=EG5fV-rEkNU Free]], which was considered their "edgiest" MV at the time. There's dark make-up, smoking, drinking, and [[spoiler:Hongki throwing a punch at... himself.]] All typical characteristics of a rebellious gang, an aspect never really shown with the band up until then. The song itself also carries much more edge than just about all their previous songs due to the heavy and wild instrumentation.
** The "Pray" song and MV. The song has harsher vocals than usual as well as very intense and ark instrumentation. The MV is near devoid of colour and has the members performing and trapped in boxes and cages while men with creepy face paint watch and mock them. The members look evidently frustrated and their screaming and powerful music eventually [[spoiler:breaks their barrier and sends the face-paint men flying]].
* ADayInTheLimeLight:
** FT Triple focuses on instrumentalists Jaejin, Jonghun and Minhwan. They first performed as this subunit in early concerts to give Hongki and Wonbin a rest from singing, and they official promoted in 2009 while Hongki and Seunghyun were busy with individual activities. It especially brought more attention to Jaejin as a vocalist since he only just started to get more lines at their time of debut and of course was typically overshadowed by Hongki.
** Jonghun surprisingly sings about 50% or more of "You and I" despite not even being an official subvocalist. He also has a solo song called "Somang" for the compilation album "Simboorum", composed by their CEO Hang Sungho.
** Part 2 of the "Heaven" MV solely focuses on Jaejin and his love interest - the first member to have one all to himself and a vast contrast to previous drama [=MVs=] which would have at least two members acting in them with Hongki usually the one with the most spotlight.
** Jonghun in the "Madly" MV... [[AvertedTrope or was supposed to]]. He was meant to be the main actor, yet the MV still ended up being 50% Hongki, with maybe 30% Jonghun and 20% everyone else - even more uneven scene distribution than usual.
** Jaejin, besides his StepUpToTheMicrophone moments, has his own OST for Hongki's drama "Bride of the Century".
** Minhwan launched his own 10-minute video series in March 2015 on their official channel called "Minari Fact TV" and he acts as a newsreporter going over the band's latest activities.
** A special teaser for "Pray" was of just Minhwan and it showed off his powerful drumming skills.
* DistaffCounterpart:
** To their younger labelmate Music/{{AOA}}'s band half of the group, AOA Black, who are FNC's first female band and hence got immediately coined as the female FT Island (or CN Blue).
*** In particular, AOA's Choa can be seen as this for Hongki, due to both being power vocalists with similar voices. She sang a bit of Madly once and even has her own version of Hongki's ''Bride of the Century'' OST "Words I Couldn't Say". FNC emphasised this by having the two sing the song together in their 2014 FNC Kingdom duet stage as well as another song.
** Labelmate Music/{{Juniel}} is called the female Hongki within their company because she is also outspoken and not afraid to challenge their CEO like he is.
* ADogNamedDog: Seunghyun simply calls his electric guitars Guitar 1, Guitar 2, Guitar 3...
* {{Dorama}}: Hongki was a main character in Japanese drama "Muscle Girl". Wonbin also briefly appeared as his friend.
* DressRehearsalVideo: Naturally, as most music videos include footage of them playing their instruments and performing as a band in a stage-setting.
* ElegantClassicalMusician: In a rock ballad band full of attractive people? Everyone, duh (yes Hongki included when he does get to play guitar or drums). Only for their ballads and mellow stuff of course - it's the exact opposite (although still beautiful in their own way) when they go all out playing their harder stuff.
* EmbarrassingFirstName: Wonbin had his name changed predebut because everyone kept teasing him for sharing it with famous actor Wonbin. He's been using his original name since his debut though - his "new" name Seonghyun is used very sparingly.
* FaceOnTheCover: So many albums covers with their faces/bodies that it's quicker to list aversions - ''The Refreshment''[[note]]they are on the cover but the lighting gives a silhouette effect and impossible to see their faces[[/note]]; ''Colorful Sensibility''; ''Double Date''; ''So Long, Au Revoir''; ''Five Treasure Box''; and ''The Mood''.
* FamilyBusiness:
** Jaejin's older sister and actress Chaewon was initially with FNC, and was the one who introduced him to them.
** Seunghyun has a younger brother at FNC, Sehyun, who seems to be focusing on acting. He's had minor acting roles including the bassist of The Stupid in ''Heartstrings''.
* {{Fanboy}}:
** Minhwan was a big fan of Nicole, formerly from Music/{{Kara}}. He has since moved on to expressing his fanboy love for Music/APink's Bomi.
** Jaejin had his Suzy (from Miss A) phase. Other members have also expressed interest in her, often calling her one of the prettiest girl group members or their ideal type.
** Jonghun for labelmate Music/{{AOA}}. He's been overly supportive of them since debut and especially likes Mina, who was once also Jaejin's phone wallpaper.
** Girls aside, there's Jaejin for Music/RedHotChiliPeppers, Jonghun for Music/{{Muse}} and Hongki for Music/ThirtySecondsToMars - Hongki in particular has been seen constantly leaving English fanboying comments on their instagram and begging them to come to Korea.
* FanNickname: [[invoked]] DiscussedTrope with Seunghyun the same year he first joined. He said on a variety show that fans would call out to the other members by their given nicknames... [[FullNameBasis and then call him by his full name]] because they hadn't given him a nickname at the time.
* {{Fanservice}}: More blatant in their early years as typical of any BoyBand, but they still provide when they feel like it. Especially when Jonghun's shirt is off either in concerts, photoshoots or selcas.
* TheFashionista: Hongki enjoys showing off his nail polish/decorations on Twitter. He has won a Fashionista Award, and even got an award for his nail art too. He has also started his first fashion brand [[http://skullhong.com/ Skullhong]].
* {{Flanderization}}: Often in scripted reality shows they partake in: [[invoked]]
** The members have an outspoken image, especially Hongki, but they are slightly rebellious at the most. In the FNC reality show ''Cheongdamdong 111'', however, they were made the attention-seeking troublemakers "villains" who always gave the CEO grief. Fans were not impressed.
** To a non-harmful extent, one of their reality shows at debut upped their personalities/images. Hongki was the funny rebellious cool guy, Jaejin was the [[SmartGuy nerdy guy,]] Wonbin was the [[BigGuy tough manly guy,]] Jonghun was the [[ChickMagnet sophisticated ladies man]] and Minhwan was the [[TheCutie sensitive cute guy.]]
** Jonghun's admitted to having a "straightforward and honest" personality but he rarely takes it far. In the second season of ''Romantic and Idol'' however he was made to be too invested in chasing after Jewelry's Yewon, all while blatantly ignoring G.NA, who had taken a liking to him, as well as Yewon's own fondness for Btob's Minhyuk. The season was obviously quite scripted with him made as a designated bad guy, but it didn't stop some people from criticizing him.
* FoodSongsAreFunny: Averted with "Morning Coffee" and "Black Chocolate" which are more tearjerkers than anything else and are mostly about their bitterness over love.
* FriendToAllChildren:
** Hongki often works with children when acting and so gets along quite well with them due to his friendly and funny personality.
** Seunghyun, who often posts photos of him with his little cousins or other children. [[https://www.youtube.com/watch?v=ebVqtS2T7vI There's also an adorable fancam]] of him at a fan-signing event where he's messing around with a boy, which shows how easy-going he is even to children.
** All the members with well-known mixed child stars Aleyna and Lincoln at Music/{{Juniel}}'s "Pretty Boy" party event, judging from their chummy photos together and fanaccounts of Lincoln messing around with some members (including going along with their pranks on each other).
* FriendToAllLivingThings: All the members are one, and fans joke about them having their own zoo. Each member has/had at least one pet of their own, typically a dog or cat, and always dote on them in their social media. In particular, Seunghyun's named his dog Kongal as one of the key words he's "focusing on", and worst offender Hongki (who owns at least one cat and ''several'' dogs) even took an album photoshoot with a few of his dogs. They've also been seen being affectionate with other animals, such as the dogs in the "Treasure" MV behind-the-scenes footage.
* FunnyBackgroundEvent: They mess around in the background a lot, especially to each other.
** In a Japanese interview, Minhwan was having a relatively serious talk... while the others pretended to fall asleep behind him.
** They (and Music/CNBlue and Music/{{Juniel}}) even did this during their CEO's acceptance speech when they all came out to accept the Best Composer/Producer award. The CEO's face was serious, everyone else's funny hand movements behind him not so much.
* FunWithAcronyms: '''F'''ive '''T'''reasure Island, which is also often abbreviated to FTI.
* FunWithForeignLanguages: While their songs do contain snippets of English, they also show instances of this outside of their music:
** Seunghyun's "Good Morning Bob" videos are infamous for abusing English and much of the entertainment is from his extreme misuse.
--->'''Seunghyun:''' My name Angry Bird. My face angry.
** They appeared on a Japanese show where they [[https://www.youtube.com/watch?v=y971nKCiHvo attempted to learn English phrases]]. Much of the entertainment from that show was due to [[HilarityEnsues the hilarity that ensued.]]
--->'''Jonghun:''' Hey come here! You lookin' sexy d-dtghrd..dress! DRESS!!
** [[https://www.youtube.com/watch?v=lfhq2HrR1wM This random exchange]] between Hongki and Jaejin during a Japanese interview:
--->'''Hongki:''' My Brother.
--->'''Jaejin:''' Yes, my brother. Do you like pizza?
--->'''Hongki:''' Ya, do you like pizza?
--->'''Jaejin:''' I like pizza.
--->'''Hongki:''' I like pizza too.
** [[http://ninabinhwan.tumblr.com/post/75358113823/learn-english-with-lee-jaejin Jaejin's (old) twitter]] was notorious for random nonsensical English tweets he wrote for fun, and fans had a ball trying to figure our what they meant half the time.
* GenkiGirl:
** Gender-inverted, Hongki and Seunghyun are the band's the energetic moodmakers and often the source of their hijinks.
** The members overall are this - their hyperactiveness even won them a "Fun and Fearless" award at one of the Golden Disc Awards.
* GratuitousEnglish:
** Not even Jaejin's SurprisinglyGoodEnglish is immune to this. See: "Hit the Sands"[[note]]"Neverland" English version[[/note]] and "Theory of Happiness" English version, where it's nearly impossible to catch what he's saying.
** Hongki's a frequent abuser of badly worded and spoken Engrish:
-->'''Hongki:''' ''(picks up and opens an English book)'' She... would be berry... ''(puts the book back down)''
** Seunghyun's another frequent abuser, as seen in the "Good Morning Bob" videos which includes him calling the kitchen a "chicken" and his quote in the FunWithForeignLanguages entry. Also try interpreting a ''thing'' of what he's saying in his talking segments of "It's U", both studio version and live - not even fans who've written transcripts and translations of the lyrics have a clue what he's saying.
* HarshVocals: Growling is used in the bridge in "Tornado".
* HeavySleeper: Seunghyun once slept for 27 hours straight.
* HeightAngst:
** Hongki, who is estimated to be less than 170cm tall despite what his profile says. He was even initially rejected from FT Island due to his short height. His bitterness showed when he called out on their CEO in a talk show for this, complaining he only pays attention to the tall people in FNC. Fellow shortie labelmates present also backed him up.
** Minhwan, who is the shortest and also said to be less than 170cm tall. He's nervous when he works alongside tall girls (such as Music/{{AOA}}'s Hyejeong in their "I Wish" MV), and his ideal girl is short, "preferably 163cm or less".
* HiredForTheirLooks:
** The person who scouted Jonghun followed and persuaded him because of his good looks and ulzzang fame. He also joked that the reason he was chosen as the band's leader is because of his pretty face.
** It's been stated that Jaejin being very photogenic was what helped FNC's decision in putting him in the band.
* HollywoodToneDeaf: Hongki [[http://youtu.be/_xbjGmvkiRQ does this]] in their cameo of Unstoppable Marriage, where [=FT4=] are "playing" as a band... only for Jaejin's character to turn off the CD player and reveal Hongki's bad singing (and everyone else's handsync) which was basically him sliding his notes up and down randomly and singing in an extra cutesy manner.
* IdolSinger: Started off as this (well the main and sub-vocalists anyways) - they're fighting against this image, however, wanting to be known not as idols but as real musicians.
* IllGirl: The ''Weekly Idol'' [=MCs=] were jokingly convinced Jaejin was a gender-inverted example, always saying he looked like a sickly old man and worrying over him getting tired. It was a RunningGag and they once even gave him a health drink. In his appearance in their 2014 special episode, they were finally satisfied with how healthy he looked. [[invoked]]
* IncrediblyLongNote: Their {{Power Ballad}}s in particular are full of belted long notes.
** As their main vocalist, Hongki gets many of these, whether it be in ballads like "Lovesick" and "Distance" or much rockier songs like "Let It Go!" and "Hello Hello". He generally pulls them off well[[note]]though sadly his voice condition has deteriorated, causing him to struggle more[[/note]] and is why he's praised a lot for his vocals and proclaimed one of kpop's greatest singers.
** Jaejin has acquired a lot of these following his continuous vocal improvement, for example in "Paper Plane" and "Morning Coffee".
** Seunghyun gets to sing them in his musicals. His encore appearances in UsefulNotes/JackTheRipper was basically him belting [[https://www.youtube.com/watch?v=xO7b2jG16xo "NAEGA JAAAAAAAAAAACK".]][[note]]"I am Jack."[[/note]] He also has a few in "Morning Coffee".
** Though none in studio recordings, Minhwan who's not even the ''sub-vocalist'' gets many opportunities to sing some at concerts, musicals and other lives. It has become tradition to have him sing Hongki's long note in "I Confess".
* JackOfAllTrades: All the members can play instruments other than their own (all at least know piano and guitar), as seen when they once swapped roles as SF Heroes. They also write lyrics, compose songs, have at least minor acting experience and are fluent in Japanese. ''And'' at least 4/5 can sing well enough to be in musicals while the only unimpressive one (Jonghun) is able to hold his own in his comfort zone. In particular:
** Jonghun is one of the most if not the most prominent composer in the band, and is exceptionally skilled in both piano, which he started playing at age 6, and guitar, and decent enough in bass to play in SF Heroes. He is also known for pursuing several hobbies such as art - and several of his paint works were actually put on display for the FNC Kingdom exhbition in Japan, [[http://topstarnews.net/hd_photo_view.php?number=87541&idx=0 several which aren't too shabby]].
** Similar to Jonghun, Seunghyun also started playing piano first from a young age, yet it doesn't mean his skills in guitar pale in comparison at all. He is also a notable singer in the group, especially evident in his involvement in musicals.
** Besides singing, Hongki writes songs, plays guitar and also knows how to drum thanks to his role as Anjell drummer Jeremy in ''Series/YouAreBeautiful'', and he showed this again in SF Heroes and his movie. This is all while also running his own fashion brand and doing his acting works.
* KoreanDrama:
** Hongki was a child actor and started actively acting again a few years after the group's debut. He was in the popular ''Series/YouAreBeautiful'', and was the lead in other productions such as ''The Bride of the Century'' and ''Modern Farmer''.
** Minhwan and Jaejin both acted in drama sitcoms in their early years, ''The Road Home'' and ''Unstoppable Marriage'' respectively. Former member Wonbin also acted in ''Heartstrings'' and sitcom ''You're Here, You're Here, You're Really Here'' after his departure.
* LawOfDisproportionateResponse: Minhwan and labelmate Music/CNBlue's Minhyuk once had a drumming contest during their trainee days, where they had to power-drum as much damage as possible to their drum-sets. Determined to win, Minhwan ''poured acid on his set''.
* TheLeader:
** Officially Jonghun, and a good one at that. He's the "Levelheaded" and "Mastermind" type, as he's the more mature member who takes care of the members and uses his composition skills to help out with a good chunk of the group's music and their musical direction.
** Hongki is an unofficial one (though many think he's the actual one due to his role as the main vocalist). He's the "Headstrong" and "Charismatic" type, as he's the most hot-blooded and vocal member whose hard work has helped the group get some exposure and his friendly and persuasive personality helps keep the group together.
* LeadBassist: Jaejin, Type B, as he sings the most after Hongki thus is at least known for his vocals.
* LighterAndSofter:
** The cheerful and bittwersweet "I Hope", compared to all the previous angsty rock ballads.
** The optimistic "Like The Birds" and poppy "I Wish" likewise followed previous angsty/melancholy title tracks "Hello Hello" and "Severely".
* LittleBigBrother: Hongki is the oldest yet the 2nd shortest. He often complains about [[BigLittleBrother Seunghyun's]] height.
* ALizardNamedLiz: Seunghyun's acoustic guitar is called Akugii, which is short for "acoustic guitar" in Korean.
* LyricsVideoMismatch: Their music videos and lyrics don't often match up all that well.
** "I Hope". Song: Upbeat song with bittersweet lyrics of the singer missing his old love, saying "even if I see you again, you're my love" and "if I am born again, all I want is you". Video: The band goes back in time and becomes famous by constantly winning on this music competition show. ''Although'', it could apply to [[spoiler:Hongki and his girlfriend whom he leaves before returning to his own time. In the current timeline at the end, a girl can be seen sitting in dark while touching the FT Island pick that Hongki gave to his girlfriend, implying that she's the same girl and hasn't forgotten him.]]
** "Hello Hello". Song: Typical break-up song where the singer can't forget his beloved. Video: Hongki goes in a burning building to save his band members.
** "Love Love Love". Song: The singer's anguish as his lover leaves him. Video: The band performing while these two marionettes struggle to be together because their strings stop them from getting too close. [[spoiler:And then they set said strings on fire and burn to their death while they finally get to hug each other.]]
** "Stay". Song: another typical post-break up love song. Video: The members writing, discussing and performing their song(s) in their studio.
* MeaningfulName:
** Many of their album names.
*** ''20 [twenty]'' - the members' average age at the time was 20 years old.
*** ''Thanks To'' - the mini was mostly made as a thank you and gift to Primadonnas.
*** ''New Page'' - to indicate a [[ExactlyWhatItSaysOnTheTin new page]] in their life and music.
*** ''5... GO'' - 5th Japanese album, 5th year into their major Japanese debut at the time, 5 members, go = 5 in Japanese and also short for "going forward".
** Their band name itself, where each member brings a treasure of talent to their fans.
* MotorMouth: Some of Seunghyun's raps are particular fast and a loadful. Special mention to his rap in "I Want", where he raps a lot, very fast ''and'' very softly, making it practically unintelligible. Except for the "I want you in my body" line.
* MrFanservice: Jonghun provides most of the fanservice, especially when showing off his abs and toned body in general. Several photoshoots are not shy about this and have him topless.
* MundaneMadeAwesome: ''"Do you know FT Island?"'' A quote that may seem strange to outsiders yet is one sure way for the band to hype up the fans for concerts. And then there's the response, ''"Do you know Primadonna?"''
* TheMusical:
** Seunghyun ie. the most active and keen one: ''UsefulNotes/JackTheRipper'', ''Summer Snow'', ''TheThreeMusketeers'' (in which he did two runs of shows).
** Jaejin, the first to participate in one: ''Sonagi'', ''Film/HighSchoolMusical''.
** Hongki: ''Theatre/AMidsummerNightsDream'', ''Literature/{{Dracula}}''.
** Minhwan: ''Gwanghwamun Sonata'', ''{{Goong}}'' and ''Theatre/JosephAndTheAmazingTechnicolorDreamcoat''.
** Also Wonbin, who too participated in ''The Three Musketeers'' (not at the same time as Seunghyun though).
[[/folder]]

[[folder:N-Z]]
* TheNapoleon: Hongki's the 2nd shortest and most hot-headed one in the group.
* NewSoundAlbum: ''Cross and Change'', where the band known for their rock ballads went nearly-full pop rock.
* NonAppearingTitle: They often stick to the TitleDrop trope but sometimes do this too. Title track/promoted song examples that avoid blatntly saying the title include "Love Sick, "After Love" and "Distance".
* NotAMorningPerson: Minhwan, Jaejin and Seunghyun can be woken up pretty easily. Jonghun takes a bit more effort. To get Hongki up, it takes three members playing the xylophone, clapping and yelling. This one time, Hongki was too stubborn to move let alone get out of bed that Minhwan concluded he was dead and mourned for him.
* OfficialCouple: Temporary and not serious of course, but Hongki with Japanese actress in Fuji Mina for ''Global We Got Married''. They have remained friends since they finished the show.
* OlderThanTheyLook: "Middle child" Jaejin's been mistaken to be younger than Seunghyun before, and even as young as Minhwan at least once.
* PowerBallad: They're most famous for their rock ballads. Amongst their many ones, "Lovesick" was a big hit and other ones such as "Severely" and "Distance" have also done well.
* PowerWalk:
** Done in their "So Today" MV towards the end to the sunset after spending a good deal standing around while angsting.
** Also used in the "After Love" MV after they stand together looking on mournfully about their break-ups.
* PutOnTheBus: Hongki took a break from activities at the end of 2013 after his accident and subsequent injuries. This included his absence from their FNC reality show and having Jaejin take his spot in the "Fashion Killa" reality show.
* RealMenWearPink:
** Despite being the most outspoken member that swears and drinks, Hongki has his heavy interest and active involvement in nail-art and fashion, going as far as to release a nail-art photobook and his own fashion brand Skullhong.
** Minhwan, who plays the most masculine instrument (the drums), has openly admitted to liking pink, calling it one of his favourite colours.
* {{Retraux}}: The retro concept of ''Cross and Change''/"I Hope" promotions, especially since they traveled back in time in the MV. It was nicknamed the "Film/{{Grease}}" concept.
* RockersSmashGuitars: Sorta, with CGI guitars on a special ''Weekly Idol'' episode. In the "Random Play Dance" segment, Jaejin, Jonghun and Seunghyun had to mime their instruments to their songs. They didn't bother aiming for accuracy and opted to go absolutely nuts which including playing the guitar with their teeth and smashing and throwing their guitars.
* RunningGag:
** Seunghyun's Harisu imitation and his caveman impersonations.
** In every Weekly Idol they've appeared in the [=MCs=] would comment on how sickly and fragile Jaejin looked. Even when they finally appeared again after over 2 years, they still took a moment to comment on how much healthier Jaejin looked.
** Jaejin the hairy man, courtesy of Hongki. [[HypocriticalHumor Who is notorious for hairy legs himself.]]
** Minhwan's "Hing Minari!" aegyo expression. The gag before was how cute yet cringeworthy it was - after growing up, the gag is how it's become cringeworthy and uncute.
** Minhwan's love for chicken is mentioned non-stop, especially fried chicken.
** Seunghyun's passionate godawful dancing, especially to [[Music/SHINee Ring Ding Dong]], and Jonghun and Jaejin's equally bad dancing to Rain.
** Seunghyun being called the one with Baseless/Groundless Confidence on ''Makbanshi'', because he was always too confident in things he always wasn't good at.
** Hongki asking fans to come to their concerts in bikinis.
** Seunghyun's poorness being mentioned in one way or another.
** Jaejin's breakups being brought up for no reason other than to mock him.
* Jonghun deleting his social media post, often almost immediately.
* SelfTitledAlbum: ''Five Treasure Island'', their first (major) Japanese album.
* SerenadeYourLover:
** Hongki sang several times to his onscreen wife Mina during their run on ''We Got Married''. He also was serenaded by her when she played "Severely" on the piano for him.
** This was a mission on ''Idol Maknae Rebellion'', and Seunghyun sang "Falling Slowly" while playing the guitar to said woman. All was looking (and sounding) good, until he paused which everyone assumed meant he was finished... and then kept going. This [[MomentKiller lost him some brownie points]].
* ShesGotLegs: Gender-inverted with Seunghyun and his long skinny legs. Fangirls are usually envious whenever he crossdresses and shows off his legs.
* {{Shiptease}}: Not as much as the first few years but they still show signs of this.
** Hongki/Jonghun, Hongki/Jaejin give the most moments in the group by purposely being overly intimate with each other and making vague statements about them belonging to each other. Jaejin/Seunghyun and Seunghyun/Minhwan are also not shy about skinship and whatnot. This is all despite them constantly talking about their love lives (with females) and stating they consider each other brothers.
** Seunghyun and labelmate Song Eunyi for subunit Two Song Place had some mild skinship in their "Age-Height" MV (including him holding her) and performances (including him holding her shoulders). Mostly PlayedForLaughs (and also the point of the song, which questions males' skewered and specific preferences for height, age and looks in women).
** Jaejin and Music/{{Juniel}} got a bit of this when they did a wedding shoot together on ''Fashion Killer'' and near-kissing was involved. They also sang "[[Disney/{{Aladdin}} A Whole New World]]" together at an FNC Kingdom concert as the "new" Romantic J, a subunit originally comprising Juniel and CNB's Jonghyun which had a rather romantic concept (judging by the promoted love song and love-story MV).
* ShoutOut:
** In the bonus track on ''So Long Au Revoir'' which was a special commentary, at the end when saying their goodbyes Hongki randomly shouts "[[Manga/{{Naruto}} Kagebushin no Jutsu!]]"
** Two Song Place's MV "Age-Height" parodies many kpop [=MVs=]. The ones Seunghyun were involved in were:
*** Troublemaker's "Now", with Seunghyun and Eunyi sitting at their car and the former holding the latter much like [[Music/{{B2ST}} Hyunseung]] and Music/{{Hyuna}}. There is also him parodying Hyungseung dressed as SelfDemonstrating/TheJoker.
*** The dance/school-uniform scene of Music/{{Exo}}'s "Growl" and the "tree of life" scene of "Wolf".
* SiblingRivalry: They have a friendly rivalry with their labelmate Music/CNBlue. Hongki has stated that their company uses FT Island as guinea pigs for CN Blue, but most fans agree that both bands are equally talented and shouldn't be compared.
* SignatureMove: Hongki's hand/body movements:
** "Love Love Love" has the hand-wave done at the "sarang sarang sarang" and "goodbye goodbye goodbye" lines.
** "Hello Hello" has the angsty hand-wave when "hello hello"/"goodbye goodbye" is sung.
** "Severely" has the "mic stand move", where at the chorus Hongki holds and moves the mic stand around and staring intensely like its his lover.
** "I Wish" has Hongki's "shoulder" dance, where he waves them at the "lonely lonely"/"love me love me" parts. Several people including other members often mimic this whenever singing/lipsyncing/dancing to it.
* SimilarSquad: With labelmate Music/CNBlue. Both are idol-rock bands and inspiring-songwriters from FNC, and member counterparts follow as vocalists and FaceOfTheBand Hongki/Yonghwa, guitarists Jonghun/Jonghyun/sometimes Seunghyun, drummers Minhwan/Minhyuk and bassists Jaejin/Jungshin. Amusingly, fans have even pointed out the similarity in some of their names. FNC has toyed with this a few times, and each pair seem to be particularly good friends too, especially 2GtJH and the bassists.
* SingerNamedrop: In the song "Troublemaker" their name is spelt out in the background towards the end.
* SingerSongwriter: All members are capable of singing and writing their own music, but it especially applies to Hongki, Jaejin and Seunghyun aka the three vocalists whom often compose.
* TheSmartGuy: Jaejin. He was an honour student and he briefly had a HollywoodNerd image at debut. He also is the best in Japanese and English in the group, and often the one who explains their albums or songs.
* SpellMyNameWithAnS: Just two.
** Hongki, Honggi?
** Jonghun, Jonghoon? Just whatever you do, do ''not'' call him Jonghyun.
* SpellingSong: Self-titled song "FT Island" which constantly spells out their name.
* StepUpToTheMicrophone: Besides being FT Triple's main vocalist, Jaejin also sings solo in two of their Japanese songs, "Rock'n'Roll" and "Yume".
* SurprisinglyGoodEnglish: Jaejin's the best in the group and acts as their spokesman. Listening to "The One" shows how clean his English is [[GratuitousEnglish compared to everyone else.]]
* SurprisinglyGoodForeignLanguage:
** All members can comfortable communicate in Japanese with not just fans but even Japanese friends too. Justified as they spent a lot of time in Japan in their indie days and already didn't need a translator when they made their major debut there.
** Before leaving, Wonbin was the one considered by members the best at Japanese. His goodbye letter, while likely written by someone else, was otherwise said quite fluently.
* TeamDad: Flip-flops between Hongki and Jonghun, who are the oldest. Both display leadership skills and will be stern to younger members when necessary.
* TeamMom[=/=]: Also flip-flops between Hongki and Jonghun. TeamDad tendencies aside, they also take good care of the other members and fuss over their wellbeing.
* TeenIdol: Debuted as idols quite young, with Minhwan debuting at age 14 and Seunghyun being 16 when he joined later on. Ever since hitting their late teens or leaving their teens, they've been working hard to break the idol image.
* TemptingFate: When the order of the performances was being drawn on an ''Immortal Song 2'' episode, one of the members commented that they hope they won't be picked as first. Guess who performed first.
* TitleDrop: Saying the song title is common in their songs. Title track/promoted song examples include "Bad Woman", "Flower Rock" and "Madly" (obviously many songs like the 1st and 3rd songs are said in Korean or Japanese and not with its English translation).
* TrademarkFavoriteFood: Members mentioning Minhwan and his love for chicken is a RunningGag. He especially likes fried chicken.
* TranslatedCoverVersion:
** Korean and/or English versions of some Japanese songs have been released as bonus tracks, such as "Theory of Happiness" and "Flower Rock". A fair amount of their Japanese songs from ''20 [twenty]'' were also translated into Korean for their album ''Five Treasure Box'', and ''All About'' is specifically a Korean album full of Korean versions of selected Japanese songs.
** Subverted in Japan: while it's the norm for Korean idols to do this for their Korean songs, FT Island's major Japanese songs have been all original - and even in their indie days, only one B-side was a remake of a Korean song ("Always Be Mine", English version of "First Kiss").
* TruckDriversGearChange: It's common in their songs to change keys in the last chorus for impact.
** Mostly common in their {{Power Ballad}}s, eg. "Severely", "Madly", "Bad Woman".
** Not uncommon in their pop or rockier music either, eg. "I Hope", "Hello Hello", "Like A Bird".
* TrueCompanions: The whole group is quite close due to nearly growing up together during their young trainee years, and consider and refer to each other as brothers in a genuine yet non-forced chummy manner. Thanks to this, they are determined to stick by one another in the good and hard times.
* UpdatedRerelease:
** Bonus tracks of ''Best Recommendation For JAPAN'' included "FT Island" and "Primadonna" with Seunghyun singing Wonbin's parts.
** "FT Island" and "Primadonna" instrumentals were slightly rearranged and rerecorded for Japanese indie album ''Prologue of FT Island''.
* TheUnfavourite: Fan exaggerations and business perspective aside, members have likened FNC's poor treatment of them to their parent overlooking them in favour of their siblings. The CEO's treatment isn't always terrible but he's prone to not putting in enough attention in their promotions nor consideration for their creative music control compared to their labelmates despite the band being their oldest and one of their most influential groups.
* {{Unperson}}: In one of their DVD documentaries released at the end of 2009, a variety show appearance from 2008 was included but Wonbin's scenes were promptly edited out since he was no longer a member.
* VitriolicBestBuds:
** Jaejin and Hongki always take jabs at each other but are very good friends and a popular ship.
** Seunghyun and Hongki truly value each other but otherwise clash a lot. In a ''Weekly Idol'' episode the [=MCs=] even jokingly held a counselling-like session for the two of them. Seunghyun also once said he wants to make his own company and have Hongki work for him, while Hongki's response to what he'd do if he could be Seunghyun for a day was, "I don't want to be him." Meanwhile they've had some touching moments, such as Hongki wiping Seunghyun's tears at a Japan concert and him once mentioning how they had a deep talk despite his busy schedule after he noticed something was bothering Seunghyun.
** Minhwan and Wonbin's friendship flip-flopped between vitriolitic and affectionate. Wonbin would often bully (PlayedForLaughs) Minhwan especially if aegyo was involved - nevertheless they showed a strong brother-like relationship, such as Wonin comforting a crying Minhwan.
* VocalTagTeam:
** Hongki/Jaejin/Seunghyun, especially the first two - more apparent in their Japanese singles though. While Hongki is the main vocalist, the subvocalists' lines are often quite generous and on par with Hongki's.
** Rap Tag Team variant: Jaejin and Seunghyun in "I Hope", "Hello Hello" and "Like The Birds" where their raps are quite even and often even rap together.
* WhatHappenedToTheMouse: Jaejin deleted his (old) twitter without warning. Despite the common fan speculation for why he did it[[note]]beforehand he tweeted a made-up phone number jokingly asking everyone to call it - [[GoneHorriblyRight the number turned out to be real and said number got numerous calls,]] and Jaejin felt pretty bad about it[[/note]], he has still not provided a reason and doesn't seem to intend to.
* WhatSongWasThisAgain: "Always Be Mine" lyrics are notably different from its original Korean counterpart "First Kiss", as is the case for their other translated songs. "First Kiss" is [[ExactlyWhatItSaysOnTheTin about one's first kiss]], while "Always Be Mine" is a typical sweet love song.
* WholesomeCrossdresser: Besides CrosscastRole, all members have at least once been crossdressed on shows simply to show off what great {{Attractive Bent Gender}}s they are.
** At least two of [[RunningGag actress Seungsoon's appearances]] were on Idol Maknae Rebellion and specifically showed off what a great girl she made. One time in particular was a "pageant" that [[http://4.bp.blogspot.com/_jc04ZWXiy3M/S1WcBqxahcI/AAAAAAAAANg/xZ80f_wH5g4/s400/tumblr_kuz5ivPVmo1qa2fcvo1_500.jpg crossdressed all the male members to see who was the most attractive girl]].
* YoungerThanTheyLook: The group themselves have admitted Jonghun looks older than he really is, though mostly in their early days. Other members even mistook him for their stylist when they first met him.[[/folder]]
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