This is a pseudonym used singularly and collectively by various individuals working with Koji Wakamatsu, e.g. Atsushi Yamatoya, Chūsei Sone, Yasuaki Hangai, Takao Yoshizawa, Mikio Terashima, Yōzō Tanaka, and Masao Adachi, among others.
Concerning this site, when the identity of the individual(s) using the pseudonym for a particular film has been established beyond a reasonable doubt, the pseudonym is removed from that particular entry and the individual(s) names are added in its place.