NinkuNinku.

Ninku (忍空, Ninkū) is a Japanese manga series written and illustrated by Kōji Kiriyama. It was serialized in Shueisha's shōnen manga magazine Weekly Shōnen Jump from June 1993 to September 1995, with its chapters collected in nine tankōbon volumes. A 55-episode anime television series, produced by Fuji Television, Yomiko Advertising and Studio Pierrot, aired on Fuji TV between January 1995 and February 1996.