Zenki.

About Zenki

Zenki is a Japanese manga series written by Kikuhide Tani and illustrated by Yoshihiro Kuroiwa. It was introduced and serialized in the Shueisha's Monthly Shōnen Jump magazine from December 1992 to September 1996. Zenki was adapted into a 51-episode anime television series in 1995 and a single original video animation in 1997 by Studio Deen and also received five video games. Media Blasters handles the English language version of the anime and its distribution rights.