When counting in Japanese, ''shichi'' is the typical word used for the number 7. However, in normal conversation, you will almost never encounter a Japanese person say ''shichi'' in any other context. The problem lies in the fact that Japanese people don't actually like the word ''shichi'', as it sounds too similar to ''shi'', the counting word for 4, which also [[FourIsDeath sounds like the word for death.]] Being a superstitious people, the Japanese really, ''really'' hate invoking death every time they count.

''Nana'' is one pronunciation for the number 7 in the Japanese language, and is the one more commonly used. In anime and manga, it's sometimes used as a feminine name with possible double meaning. If a character appears with the name Nana, expect MeaningfulName.

Keep in mind, however, that if you want to describe seven ''things'', seven ''objects'', or seven ''people'' then you'll be using different words entirely. Yeah...Japanese is hard.

OneTwoThreeFourGo is a SisterTrope. See also NumericalThemeNaming.
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!!Examples:

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[[folder:Anime and Manga]]
* ''ElfenLied'' features experimental subject Number Seven, or "Nana" as her father figure calls her.
* ''{{Loveless}}'' has a {{Hikikomori}} called Nana who only briefly shows up in the anime but plays a larger part in the manga, and her name likely refers to her dependence on computers. She's referred to as "Seven" in the Tokyopop manga release... until volume eight, when [[InconsistentDub they switch to Nana]].
* Both stars are named Nana in the manga ''{{Nana}}'', and live in apartment 707 -- effectively using this trope as its entire premise. One of them is called "Hachi" (short for Hachiko, but also meaning ''eight'') to differentiate between them.
* In ''Shichinin no Nana'' (''SevenOfSeven'')[[note]]A decidedly weird title since, per the note above, the Japanese title uses two different "seven" words -- whereas English doesn't, even though the second "seven" makes no sense out of context![[/note]], a girl named [[MeaningfulName Nana]] is [[MesACrowd split into]] seven [[LiteralSplitPersonality personality fragments]].
** And all those fragments get names that describe them and start with ''Nana''. [[spoiler:The exception is the ''eighth'', bad Nana, Jamanana.]]
** Best of all, the primary Nana's Japanese voice actor is ''also'' named Nana (NanaMizuki, as a matter of fact).
* In ''PuniPuniPoemi'', the seven Aasu sisters are all named after numbers, in reverse age order. So the youngest sister is named Hitomi (from "hito" - one), and the oldest is named Nanase.
* ''KodomoNoOmocha'''s Sana is named after her birthday, March 7.
* In ''Manga/KatekyoHitmanReborn'' Tsuna is occasionally associated with the number 27. It's on his door, as well as the mitten form of his X gloves. Tsu sounds like two, and na is seven. Thus, 27. Made cuter by the fact that his mother's name is actually Nana and his father is Iemitsu. The last syllables of their names makes Tsuna's name.
* Saki of ''FutariWaPrettyCureSplashStar'' is associated with flowers (hana); naturally, her birthday is August seventh (ha - eight, na - seven).
** In the first episode of ''HeartcatchPrettyCure'', Tsubomi is seen wearing a shirt with a 7 on it. This has two possible meanings -- the fact that it's the seventh season of the series, or an ActorAllusion to [[NanaMizuki her seiyuu]].
* Nanaho Kinjou in ''Anime/BestStudentCouncil'' is the seventh child of the Kinjou family. Her ''KillerYoYo'' has a seven emblazoned on it, and one of her blouses has a seven on it as well. Taking the number theme further, her nickname for her six older brothers are their birth numbers.
* In ''Manga/{{Othello}}'', Nana receives a mix tape with "For 7" on it. She then realizes it means "For Nana".
* The main protagonist in ''Manga/BattleRoyale'' is Shuya Nanahara, nicknamed 'Wild Seven' because of his surname.
* In ''Manga/AreaNoKishi'', Nana Mishima, a.k.a "Seven", was referred to by her elementary school football jersey number, which just so happened to be "7".
* Nanami in the name [[MermaidMelodyPichiPichiPitch Lucia Nanami]] means "seven seas".
* Playing off the all ready established pun of "Nonoriri" referring to [[spoiler: [[{{Gunbuster}} Noriko]]]], [[{{Diebuster}} Nono]] is ''also'' a pun by bring next to "nana" [[spoiler: as she is [[YouAreNumberSix Buster Machine Number 7]]]].
* Nanael from QueensBlade also counts, since almost all the angels from that series are named after numbers with the Hebrew suffix "-el" included. (Her best friend and senior, Hachiel, has number eight as her prefix in her name.)
* TVTokyo's current mascot is a banana shaped liked the number seven (referring to their channel number) called Nanana.
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[[folder:FanWorks]]
* An unnamed backgrounder character from ''{{Daria}}'' referred to officially only as "Cheerleader #7" has picked up the name Nana, short for Natalie Nash, in {{Fanon}}.
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[[folder:Video Games]]
* ''VideoGame/MegaManXCommandMission'' has a [[RidiculouslyHumanRobots Reploid]] named Nana as your MissionControl, with the number seven displayed prominently on each of her breasts.
* There are two examples in ''{{Tsukihime}}'':
** Early in the game, Shiki gets a knife engraved with kanji. Assuming they represent words, he reads them as "Seven Nights". They're actually a name: '''Nana'''ya, which is [[spoiler:the name of Shiki's real family.]]
** Nanako in ''Kagetsu Tohya''. Originally... well, not quite originally since she was a human once with a presumably human name. Er. Anyway, previously, her name was Seven, in English, as she's the spirit of the Seventh Scripture; a fusion weapon [[ItemCrafting created from]] her soul and the horn of a unicorn monster. Arihiko translates that to Japanese, Nana, and then adds a feminine ending to it. There, Nanako the horsegirl, spirit of a [[{{BFG}} BF]] Harpoon Gun that shoots pages of the Bible. Yep.
* ''HigurashiNoNakuKoroNi'' gives us Rena, which is one reading for the characters for 0 and 7 and a reference to the name of the creator, Ryukishi07. Reina would be a more commonly expected reading for 07, and that turns out to be Rena's original given name.]
* The title of ''NanashiNoGame'' can mean ''na-nashi no game'' - the game with no name, and that is the primary meaning. However, it can also mean ''nana-shi no game'' - the seven-death game, as in the game that kills you in seven days.
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[[folder:Real Life]]
* "Na na na" in a song is sometimes shown as the Arabic number 7 in karaoke. One example of this is [[http://www.youtube.com/watch?v=V45mxKzyoGk Konjiki no Gash Bell's sixth ending]].
* NanaMizuki milks this trope for all it's worth with her singing career up to a point that she charges $77 for her concert tickets.
** And she voices the Windows 7 WebOriginal/OSTan, [[MoeAnthropomorphism Nanami Madobe]] ([[PunnyName her names meaning "seven"(-mi) and "by the window"]]).
*** Actually nanami can mean 777 too. So 777 by the window. Yeah...
** She voices another Nanami in ''DogDays''.
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