Ninja Hattori-kun
English title: Ninja Hattori-kun
Japanese title: 忍者ハットリくん
Alternative titles: Hattori the Ninja, Hattori, the Little Ninja, Ninja Hattori
Type: TV
Source: Manga
Episodes: 694
Status: Finished Airing
Aired: Sep 28, 1981 to Dec 25, 1987
Broadcast: Not scheduled once per week
Duration: 10 min per ep
Rating: G - All Ages
Studios: Shin-Ei Animation
Genres: Comedy, Slice of Life
Themes: Martial Arts
Demographics: Shounen

The everyday Sanyo family gets an unexpected surprise in the shape of a new lodger-Hattori is a ninja boy who has come down from the Iga mountains to attend normal school. Befriending Kenichi Sanyo, who is the same age as he, Hattori starts attending school undercover, occasionally accompanied by his brother, Shinzo, Shishimaru the ninja dog, and Kenichi's girlfriend, Yumeko. The gang is also threatened by the rival Koga ninja, Kemumaki, and his evil sidekick, Kagechiyo the Shadow-cat. 

(Source: The Anime Encyclopedia)