[[quoteright:250:https://static.tvtropes.org/pmwiki/pub/images/uchiyamakouki.jpeg]]

Born on August 16, 1990 in Saitama Prefecture, Japan, '''Kōki Uchiyama''' or called simply by his fans as "Ucchi", Ucchi is a Japanese voice actor who mainly voices aloof young males character with DeadpanSnarker tendencies.

He made his debut as Roxas in ''VideoGame/KingdomHeartsII''. In the 5th Annual {{Seiyuu}} Awards, he won the Best New Voice Actor award for 2011.

He often appears in anime with Creator/MiyuIrino and/or Creator/MamoruMiyano. He also often plays the younger male to Creator/MegumiToyoguchi's older female, also often play as a couple with Creator/KanaHanazawa.

No relation to fellow voice actress Creator/YumiUchiyama.
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!!Notable roles by Ucchi:

* Akihiro Shimazu in ''Manga/{{Orient}}''
* [[Characters/DevilmanCrybabyAkiraFudo Akira Fudo]] in ''Anime/DevilmanCrybaby''
* Akito Yamada in ''Manga/LovingYamadaAtLv999''
* Aldo in ''VideoGame/AnotherEden''
* Alice Color in ''Literature/SundayWithoutGod''
* Banagher Links in ''Anime/MobileSuitGundamUnicorn'' and ''VideoGame/SuperRobotWars''
* Japanese dub voice characters played by Creator/BarryKeoghan
** Druig in ''Film/{{Eternals}}''
** Unnamed Arkham Prisoner ([[spoiler:The Joker]]) in ''Film/TheBatman2022''
* Benedict Blue in ''Literature/VioletEvergarden''
* Beyazit in ''Manga/AltairARecordOfBattles''
* Brakka in ''VideoGame/{{Harvestella}}''
* Brandish (No. 7) in ''VideoGame/MightyNo9''
* Carpaccio Luo-Yang in ''Manga/MashleMagicAndMuscles''
* Clavis in ''Anime/DeathParade''
* Click in ''VideoGame/Reverse1999''
* Daisuke Dojima in ''Anime/{{Revisions}}''
* Daryl Yan in ''Anime/GuiltyCrown''
* Debt Collector in ''Anime/AkibaMaidWar''
* Desast in ''Series/KamenRiderSaber''
* Dio Junyou Weinberg in ''Anime/BuddyComplex'' and ''VideoGame/SuperRobotWars''
* Elephas Levi in ''Literature/ImTheVillainessSoImTamingTheFinalBoss''
* Elliot Alderson (Creator/RamiMalek) in the Japanese dub of ''Series/MrRobot''
* Erik in ''VideoGame/DragonQuestXI''
* Errol in the Japanese version of ''VideoGame/ArenaOfValor''
* [[Characters/DragaliaLostThePrinceEuden Euden/The Prince]], [[EvilTwin Nedrick]]/[[DubNameChange Nedeu]] in ''VideoGame/DragaliaLost''
* Gin in ''Manga/HotarubiNoMoriE''
* [[VideoGame/PokemonSunAndMoon Gladio (Gladion)]] in ''VideoGame/PokemonMasters''
* Goldov Auora in ''Literature/RokkaBravesOfTheSixFlowers''
* Hamaguchi in ''Manga/TeasingMasterTakagiSan''
* Harry Creighton in ''Anime/HeroMask''
* Japanese dub voice characters played by Music/HarryStyles
* Hiroshi Kido in ''Manga/{{Barakamon}}''
* Ichika Orimura in ''Literature/InfiniteStratos''
* Idia Shroud in ''VideoGame/TwistedWonderland''
* Ikuro Hashizawa[=/=]Manga/{{Baoh}} in ''VideoGame/JoJosBizarreAdventureAllStarBattle''
* Ikuya Kirishima in ''Anime/{{Free}}''
* Izumi Miyamura in ''Manga/{{Horimiya}}'' (2021)
* Jack in ''Anime/MetalFightBeyblade''
* Joker ([[spoiler:his real name is Lean]]) in ''VideoGame/FinalFantasyType0''
* Kagura Demuri in ''Anime/AquarionEvol'' and ''[[VideoGame/SuperRobotWarsZ Super Robot Wars Z3]]''
* Kaito in ''Manga/{{Gleipnir}}''
* Kaito Tenjo in ''Anime/YuGiOhZEXAL'' and ''Anime/YuGiOhArcV''
* Kaoru Amazake in ''Literature/AsakusaOniyomeNikki PV''
* Kei Tsukishima in ''Manga/{{Haikyuu}}''
* Keita Tsuwabuki in ''Manga/GoodLuckGirl''
* Kelvin in ''Literature/BlackSummoner''
* Kentaro Izawa in ''[[Manga/TheKindaichiCaseFiles Kindaichi Case Files OVA: Kuromajutsu Satsujin Jiken-hen]]''
* Kimimaro Yoga in ''[[Anime/CControl [C] - The Money of Soul and Possibility Control]]''
* Kotetsu (Cameron) in ''Anime/PokemonTheSeries''
* Kuon Seo in ''VideoGame/{{Reynatis}}''
* Kyotaro Sugishita in ''Manga/WindBreaker''
* Lancelot in ''Manga/TheSevenDeadlySins''
* Legato Bluesummers in ''Anime/TrigunStampede''
* Lest in ''VideoGame/RuneFactory4''
* Lev Leps in ''Literature/IrinaTheVampireCosmonaut''
* Lucifer in ''Manga/BlueExorcist''
* Makoto Tsukimoto in ''Manga/PingPong''
* Manase Mifune in ''Game/ProjectNoah''
* Melzalgald in ''Manga/OnePunchMan''
* [[Characters/HunterxHunterMeruem Meruem]] in ''Manga/HunterXHunter'' 2011
* Midnight in ''Manga/FairyTail''
* Miyuki Sagara in ''Literature/RDGRedDataGirl''
* Mushiki Kuga in ''Literature/KingPropose''
* Natsuki Usami in ''Anime/{{Tsuritama}}''
* Natsuno Yuuki in ''Literature/{{Shiki}}''
* [[Characters/TheWorldEndsWithYouNekuSakuraba Neku Sakuraba]] in ''VideoGame/TheWorldEndsWithYou'', ''VideoGame/KingdomHearts3DDreamDropDistance'', [[spoiler:and the original game's sequel, ''VideoGame/NEOTheWorldEndsWithYou'']]
* ComicBook/{{Nightcrawler}} (Creator/KodiSmitMcPhee) in the Japanese dub of ''Film/XMenApocalypse''
* Park Ilpyo in ''Webcomic/TheGodOfHighschool''
* Philip in ''VideoGame/KamenRiderMemoryOfHeroez'' and ''Manga/FuutoPI'' (Replacing Masaki Suda from ''Series/KamenRiderDouble'')
* Prince in ''RedHairedSnowWhite''
* The Protagonist / "Wonder" in ''VideoGame/Persona5ThePhantomX''
* Raku Ichijou in ''Manga/{{Nisekoi}}''
* Razor in ''VideoGame/GenshinImpact''
* [[Characters/TrailsSeriesReanSchwarzer Rean Schwarzer]] and [[Characters/TrailsSeriesSeptTerrionsAndHolyBeasts Ishmelga Rean]] in the ''VideoGame/TrailsSeries'' and the ''Nothern War'' anime.
* Rei Suwa in ''Anime/BuddyDaddies''
* Rin Itoshi in ''Manga/BlueLock''
* [[Characters/KingdomHeartsRoxas Roxas]] and [[Characters/KingdomHeartsVentus Ventus]] in ''Franchise/KingdomHearts''
* Rui in ''Manga/DemonSlayerKimetsuNoYaiba''
* Ruth in ''Manga/TheAncientMagusBride''
* Ruo Mori in ''Manga/DanceDanceDanseur''
* "Ryoji Kaji" in ''Anime/RebuildOfEvangelion''
* Ryuto Tsukishima in ''VideoGame/TheCaligulaEffect2''
* Saejima in ''Manga/TheIceGuyAndHisCoolFemaleColleague''
* Sam in the Japanese dub of ''VideoGame/TheLastOfUs''
* Seijiro Itou in ''Anime/ZombieLandSaga''
* Seiya Kanie in ''Literature/AmagiBrilliantPark''
* Shion Madarame in ''Manga/TokyoRevengers''
* Shirou Kotomine in ''Literature/FateApocrypha'' and ''VideoGame/FateGrandOrder''.
** Tristan in ''VideoGame/FateGrandOrder''.
* Shobu Kirifuda in ''Anime/DuelMasters'' (starting with ''VS'', since Shobu is an adult now, Creator/YumikoKobayashi still voices his brother, Katta [[note]] The 2nd protagonist [[/note]] and nephew, Joe [[note]] The 3rd protagonist [[/note]] though)
* Shun Futami in ''Manga/CoolDojiDanshi''
* Shun Uruma in ''Manga/JuujikaNoRokunin''
* Sizumu in ''Anime/SSSSDynazenon''
* Skull, Aaron and Ellis Stamp in ''VideoGame/GranblueFantasy''
* Soma and Aldo from ''Literature/IsItWrongToTryToPickUpGirlsInADungeon''
* Soul Eater Evans in ''Manga/SoulEater''
* Sui Aoi in ''Manga/MissionYozakuraFamily''
* Susanoo in ''VideoGame/Onmyoji2016''
* T.J. Detweiler in the Japanese dub of ''WesternAnimation/{{Recess}}'' (Wasabi Mizuta voiced him briefly in the first few episodes)
* Taiki Himekawa in ''Manga/OshiNoKo''
* Takahiro Oomae in ''Manga/DiamondNoAce''
* Takashi "Shindo" Sugiyama in ''Literature/RunWithTheWind''
* Takumi Sakagami in ''Anime/TheAnthemOfTheHeart''
* Takt Asahina in ''Anime/TaktOpDestiny''
* Theodore Sherman/Minotaur in ''Manga/ToTheAbandonedSacredBeasts''
* Toge Inumaki in ''Manga/JujutsuKaisen''
* Toi Kuji in ''Anime/{{Sarazanmai}}''
* Tooru Takatsuki in ''Manga/LiarXLiar Drama CD''
* Tsuyoshi "Tsuyopon" Naoe in ''Manga/NijiroDays''
* [[Characters/MyHeroAcademiaTomuraShigaraki Tomura Shigaraki]]/[[spoiler:Tenko Shimura]] in ''Manga/MyHeroAcademia''
* Ulgar Zweig in ''Manga/AstraLostInSpace''
* [[Characters/DevilMayCryV V]] in ''VideoGame/DevilMayCry5''
* Xue Yang in the Japanese dubs of the ''Literature/GrandmasterOfDemonicCultivationMoDaoZuShi'' animated adaptation and the live-action adaptation ''Series/TheUntamed''
* Yogiri Takatou in ''Literature/MyInstantDeathAbilityIsSoOverpowered''
* Yoichi Kiriki in ''Manga/AoAshi''
* Yoshino Takigawa in ''Manga/BlastOfTempest''
* Yoma Hashimoto in ''Manga/ThusSpokeKishibeRohan''
* Yuri Plisetsky in ''Anime/YuriOnIce''
* Yuu Otosaka in ''Anime/{{Charlotte}}''
* Yuuji Yugami in ''Manga/YugamiKunNiWaTomodachiGaInai'' (CM)
* Yuujirou Someya in ''Music/ConfessionExecutiveCommittee''
* Yuuta Asaba in ''Manga/YouAndMe''
* Yuuya Tanahashi in ''Manga/LoveLab''
* Yuzuki Kurezome in ''VideoGame/NierReincarnation''
* Zakuro Oshigiri in ''Manga/TheOnesWithin''
* Zhuge Liang Freedom Gundam in ''Anime/SDGundamWorldSangokuSoketsuden'' and ''Anime/SDGundamWorldHeroes''

!! Tropes associated with him.
* ChickMagnet: Even when he doesn't star in a Harem Anime, his character usually is a target of affection for a lot of girls.
* DeadpanSnarker: A lot of his character share the same dry sense of humour.
* JerkWithAHeartOfGold: A lot of his character always seems to be a brooding loner that appears to be cold but in actuality they have a hidden heart of gold.
* PlayingAgainstType: Ucchi is notable for his aloof and quiet roles so it's really refreshing when we hear him as the hysterical Raku Ichijou from ''Manga/{{Nisekoi}}''.
* StarMakingRole: Roxas and Ventus in ''Franchise/KingdomHearts'' since that's when he started voicing as a teen. It goes further with Soul "Eater" Evans in ''Manga/SoulEater'' since the Anime was created a few years after ''VideoGame/KingdomHeartsII'' was released.
* {{Typecasting}}: While he can be quite versatile, a lot of Ucchi's roles is usually a snarky, aloof and silent loner.
* VocalEvolution: Over the years, his voice as Roxas has changed from a real mid-teen voice to a deep broody voice.
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