Ninja Hattori-kun (2012)

Hattori Kanzo leaves his Iga ninja training grounds for Tokyo and begins living with the Mitsuba family. There he befriends ordinary schoolboy Kenichi, using ninjutsu to help with everyday problems that rarely stay simple once Hattori becomes involved.

Life grows even more chaotic because Kenichi's classmate Kemumaki is secretly a ninja from the rival Koga school. Their competing techniques, schemes, and pride turn school troubles and neighborhood incidents into playful ninja battles hidden inside modern city life.