|High School Student, Ninja|
|Yamanouchi Ninja School (Former)|
|No Known Relatives|
|No Known Friends|
|No Known Love Interests|
|No Known Pets|
|Behind the Scenes|
Fukushima exhibited a superiority complex and prejudice to those different than himself, something that Master Sensei warned him against.
When he allied himself with Monkey Fist, they were able to steal the Lotus Blade and capture Yori. After Yori was captured, Fukushima agreed to help Ron in rescuing her, but it was a trap, which he was purposely leading Ron into. Ron then defeated Fukushima by tapping into and channeling his Mystical Monkey Power for the first time, with less than a week of ninja training.
Fukushima appeared to be a very skilled martial artist.
He had a rivalry with Ron Stoppable, who was an exchange student at the Yamanouchi Ninja School, and frequently called Ron "Outsider." He also laughed whenever Ron made a mistake during training.
Behind the Scenes
Fukushima is voiced by Dante Basco.