Shuichiro Katsumura (勝村 周一朗, Katsumura Shūichirō, born June 17, 1976) is a Japanese former mixed martial artist and professional wrestler who currently competes for Ganbare Pro-Wrestling, where he was a Spirit of Ganbare World Openweight Champion and Spirit of Ganbare World Tag Team Champion.

[1][2] He competed in the Flyweight, Bantamweight and Featherweight[3] divisions.

Katsumura is credited in popularizing the "Ninja Choke" submission and is the current owner of ZST.

After graduating from university, he worked as an employee at a child care facility in Kamakura while continuing his martial arts training.

This is where his nickname "Real Tiger Mask" comes from.