Watch UNDER NINJA Online (2023)

Where to watch “UNDER NINJA” (2023) online legally? See US streaming options first, plus English-region fallbacks.

UNDER NINJA first aired in 2023 • originally associated with TBS • 1 season • 12 episodes • around 24 minutes per episode • status: Ended.

If you searched for “watch UNDER NINJA online” (2023), the safest approach is to verify legal availability in your region (US first, then English-region fallbacks).

It sits in the Animation, Drama, Comedy space, which helps set expectations for tone and pacing.

Ratings vary by audience taste—check the synopsis and cast to see if it matches what you like.

This page includes season navigation, episode list, cast, trailer (when available), and legal provider hints to help you decide quickly.

Synopsis

Thousands of ninjas live in secret across Japan. One underachieving ninja spends his days doing nothing — until he receives a special mission.

Keywords

japan, slice of life, ninja, based on manga, seinen, anime.

Stills

Similar series

NARUTO Spin-Off: Rock Lee & His Ninja Pals, Ayakashi Triangle, Ai Yori Aoshi, Love Flops, Ninja Kamui, Tawawa on Monday, Hell's Paradise, Sound of the Sky.

Main cast

Taito Ban

as Kuro Kumogakure (voice)

Atsumi Tanezaki

as Suzuki (voice)

Tarusuke Shingaki

as Kato (voice)

Tasuku Hatanaka

as Miracle Hibi (voice)

Kouichi Souma

as Ozu (voice)

Chika Anzai

as Kawado (voice)

Cho

as Oono (voice)

Official trailer