Kato Chan & Ken Chan is a PC-FX game likely featuring the titular characters Kato Chan and Ken Chan in an adventure. Unfortunately, detailed information on its plot, gameplay style, or development is rare.  Without further information, it is difficult to state the exact genre, but it's likely a platformer or an adventure game given the console's general library.  Given the platform, we can assume NEC published it in Japan.

Kato Chan & Ken Chan (Japan)

Juuouki (Japan)