History Manga / UnderNinja

* AxesAtSchool: With the setting of the first arc being a high school being infiltrated by two ninja factiosn, this is a given. Batons, spring-loaded knives and later swords all get involved, not to mention the NIN-owned KillSat called "Escape" orbiting overhead.

* AxesAtSchool: With the setting of the first arc being a high school being infiltrated by two rivalling gangs of ninja, this is a given. Batons, spring-loaded knives and later swords all get involved, not to mention the NIN-owned KillSat called "Escape" orbiting overhead.

* DarkestHour: After KHS was destroyed by Escape, UN began to use the stolen NIN data to assassinate NIN agents. This forces the survivors to go and hide. [[spoiler:Kato's punished by the higher-ups in NIN for letting Saruta kill Onikobe and get NIN data from Escape stolen. He's later sentenced to die in "Me and Old Dudes" alongside other NIN agents. Kuro's other siblings are forced to take over his work and go after Yamada, partly for killing him.]]

* GasLeakCoverUp: NIN covers up [[spoiler:Escape vaporizing KHS]] by letting their agents in the government blame the explosion on methane gas buildups.

* OffWithHisHead: At the start of the manga, a foreign special forces unit in the Middle East finds [[MiddleEasternTerrorists the corpse of a suicide bomber]] with no head and thumb, which was done to avoid triggering the remote detonator attached to his suicide vest.

* AtrociousAlias: Kurō uses the surname "Kumogakure" (Hidden Cloud Village) as a fake surname during his infiltration. Everyone immediately points out just how incredibly conspicuous it is as a name, to which Kurō replies it's [[BlatantLies one of the top ten most common family names in Japan]]. No-one believes it.

* HardDrinkingPartyGirl: Ai, who is rarely seen not-drunk. Kurō steals her beer on at least one occasion.

Kurō Kumogakure, who happens to be unemployed, was approached to be a ninja with instructions to investigate Kodan High as his first mission with the National Intelligence of NINJA (or NIN). NIN later gets into conflict with another ninja group known as [[TitleDrop Under Ninja]].

* GasLeakCoverUp: NIN covers up Escape shooting at KHS by letting their agents in the government blame the explosion on methane gas buildups.

* MythArc: The first part/s of the manga has NIN investigate Kodan High School and why UN is interested in it. [[spoiler:NIN finds out that UN is launching an attack on KHS as a distraction so that they can get to NIN's KillSat known as Escape, breach it and get their hands on confidential NIN data. This was followed by assassinating most of their rank and file by miniature FPV drones that survivors are forced to hide and restric their activities.]]

An anime version is animated by Tezuka Productions. It's directed by Satoshi Kuwabara with the script written by Keiichirō Ōchi. It airs in Japan in various TV channels like TBS Television and [=BS11=] in October 2023. Crunchyroll streams it in English.

An anime version is animated by Tezuka Productions. It's directed by Satoshi Kuwabara with the script written by Keiichirō Ōchi. It airs in Japan in various TV channels like TBS Television and [=BS11=]. Crunchyroll streams it in English.

* InvisibilityCloak: NIN researchers were able to make optical camouflage for its ninja agents. To make it effective (and work), the user must chant a mantra in order to activate it.

Kurō Kumogakure, who happens to be unemployed, was approached to be a ninja with instructions to investigate Kodan High as his first mission with the National Intelligence of NINJA (or NIN).

* ElitesAreMoreGlamorous: The manga portrays the ninja as special forces deployed abroad in anti-terrorist missions. It is TruthInTelevision as recorded documentation in Japan suggests that ninjas were used in pre-Meiji Japan as spies and saboteurs.
** From the first chapter, the foreign SOF unit in the Middle Eastern city assigned to take out a suicide bomber.

An anime version is animated by Tezuka Productions. It's directed by Satoshi Kuwabara with the script written by Keiichirō Ōchi. It airs in Japan in various TV channels like TBS Television and [=BS11=]. Crunchyrolll streams it in English.

* InvisibilityCloak: UN researchers were able to make optical camouflage for its ninja agents. To make it effective (and work), the user must chant a mantra in order to activate it.

Kurō Kumogakure, who happens to be unemployed, was approached to be a ninja with instructions to investigate Kodan High as his first mission with UNDER NINJA (UN).

''Under Ninja'' is a manga written and illustrated by Kengo Hanazawa of ''Manga/IAmAHero'' fame, published by Kodansha in Japan and by Denpa in English. The manga began serialization in ''Weekly Young Magazine'' in 2018.

In an alternate world, the Main/{{Ninja}} did not disappear even after the end of the Edo period. Their last appearance was in the end of the Pacific War where a group of anti-Imperial Japanese ninjas protected Allied Forces commander Douglas [=MacArthur=] from being killed after his arrival in Japan by pro-Imperial ninjas. However, it was reported that [[UngratefulBastard the order came from GHQ]] to disband them. In secret, they still exist. And they're being used by Tokyo for national security policies under the National Intelligence of NINJA (or NIN). Others have either become unemployed, forced to work in menial jobs or are Main/{{Hikikomori}}s.

* InvisibilityCloak: UN researchers were able to make optical camouflage for its ninja agents. To make it effective (and work), the user must chant a mantra in order to activate it.

Kurō Kumogakure, who happens to be unemployed, was approached to be a ninja with instructions to investigate a certain school as his first mission with UNDER NINJA (UN).

* TwoLinesNoWaiting: The manga starts with two plots. One consists of Kurō being recruited as a ninja to investigate a school. Meanwhile, Alexei has come to Japan from abroad in order to start infiltrating a ninja clan so that he can see his daughter again.

In an alternate worlds, the Main/{{Ninja}} did not disappear even after the end of the Edo period. Their last appearance was in the end of the Pacific War where a group of anti-Imperial Japanese ninjas protected Allied Forces commander Douglas [=MacArthur=] from being killed after his arrival in Japan. However, it was reported that [[UngratefulBastard the order came from GHQ]] to disband them. In secret, they still exist. And they're being used by Tokyo for national security policies under the National Intelligence of NINJA (or NIN). Others have either become unemployed, forced to work in menial jobs or are Main/{{Hikikomori}}s.

''Under Ninja'' is a 2018 manga written by Kengo Hanazawa of ''Manga/IAmAHero''. It's published by Kodansha in Japan and by Denpa in English. It's serialized in Japanese under Weekly Young Magazine.