Tokyo Wakusei Planetokio

Osamu Sato
Osamu Sato worked on the game, he was its developer.

The game
It is an action/adventure/RPG game that was only released in Japan, and nowhere else. It should be avaliable on emulators somewhere, though.

The wiki
http://planetokio.wikia.com/wiki/Tokyo_Wakusei_Planetokio_Wikia