Okojo-san (オコジョさん) is a Japanese manga series written and illustrated by Ayumi Uno and serialized in LaLa. The chapters were collected into eight tankōbon volumes by Hakusensha and released from 1996 to 2005. The series is about an ermine living as a pet in a small apartment complex.

Because of the characteristic of e621, arts that apper there will very likely to include:
Okojo♂
Chorori♂
Kojoru♀
Tatchin♂