Born November 20, 1980 in Shimokitazawa, Setagaya, Tokyo

Actress and idol represented by Yellow Cab. Koike is probably best known internationally for the film 2LDK, though she's built a solid career across TV and film in Japan. For six years, from 2000 to 2006, she worked as a ringside commentator and spokesperson for PRIDE Fighting Championships—a notable side gig that kept her visible in the MMA world during its peak popularity in Japan.

She's married to pro wrestler Sakata Wataru.