| Shuichiro Katsumura | |
| Native Name: | 勝村周一朗 |
| Native Name Lang: | ja |
| Birth Date: | 17 June 1976 |
| Birth Place: | Yokohama, Kanagawa, Japan |
| Nationality: | Japanese |
| Weight: | 132lb |
| Weight Class: | Flyweight Bantamweight Featherweight |
| Team: | Reversal Gym Yokohama Ground Slam |
| Years Active: | 1999 - 2011 (MMA) |
| Mma Kowin: | 1 |
| Mma Subwin: | 8 |
| Mma Decwin: | 2 |
| Mma Koloss: | 4 |
| Mma Subloss: | 2 |
| Mma Decloss: | 3 |
| Mma Draw: | 3 |
| Sherdog: | 1291 |
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.
|-| Loss| align=center| 11-9-3| Koetsu Okazaki| TKO (Punches)| Shooto: Shooto Tradition 2011| | align=center| 2| align=center| 2:24| Tokyo, Japan| |-| Loss| align=center| 11-8-3| Darren Uyenoyama| TKO (Punches)| Shooto: The Way of Shooto 5: Like a Tiger, Like a Dragon| | align=center| 2| align=center| 3:53| Tokyo, Japan| |-| Win| align=center| 11-7-3| Masakatsu Ueda| Submission (Ninja Choke)| Shooto: The Way of Shooto 2: Like a Tiger, Like a Dragon| | align=center| 2| align=center| 3:39| Tokyo, Japan| |-| Win| align=center| 10-7-3| So Tazawa| Submission (D'Arce Choke)| Shooto: Revolutionary Exchanges 3| | align=center| 1| align=center| 3:54| Tokyo, Japan| |-| Win| align=center| 9-7-3| Hiroyuki Yamashiro| Submission (Twister)| Zst: Zst 20| | align=center| 1| align=center| 2:56| Tokyo, Japan| |-| Loss| align=center| 8-7-3| Alexandre Franca Nogueira| KO (Punch)| K-1 HERO's: Middleweight Tournament Opening Round| | align=center| 2| align=center| 1:55| Yokohama, Japan| |-| Loss| align=center| 8-6-3| Katsuhiko Nagata| TKO (Punches)| K-1: Premium 2006 Dynamite!!| | align=center| 1| align=center| 4:12| Osaka, Japan| |-| Draw| align=center| 8-5-3| Kentaro Imaizumi| Draw| Zst: Zst 11| | align=center| 2| align=center| 5:00| Tokyo, Japan| |-| Win| align=center| 8-5-2| Artemij Sitenkov| Submission (Choke)| Shooto Lithuania: Bushido| | align=center| 1| align=center| 2:29| Vilnius, Lithuania| |-| Draw| align=center| 7-5-2| Kenichi Osawa| Draw| Zst: Zst 9| | align=center| 3| align=center| 3:00| Tokyo, Japan| |-| Win| align=center| 7-5-1| Kit Kieu| Submission (Armbar)| Zst: Zst 8| | align=center| 1| align=center| 4:21| Tokyo, Japan| |-| Win| align=center| 6-5-1| Sergej Juskevic| Technical Submission (Omoplata)| Zst: Battle Hazard 2| | align=center| 1| align=center| 2:51| Tokyo, Japan| |-| Loss| align=center| 5-5-1| Hideo Tokoro| Technical Submission (Guillotine Choke)| Zst: Grand Prix 2 Opening Round| | align=center| 1| align=center| 0:38| Tokyo, Japan| |-| Loss| align=center| 5-4-1| Marcos Galvao| Decision (Unanimous)| Shooto 2004: 1/24 in Korakuen Hall| | align=center| 3| align=center| 5:00| Tokyo, Japan| |-| Win| align=center| 5-3-1| Eugenij Konkov| Submission (Rear-Naked Choke)| Shooto: Wanna Shooto 2003| | align=center| 1| align=center| 2:48| Tokyo, Japan| |-| Loss| align=center| 4-3-1| Kentaro Imaizumi| Decision (Unanimous)| Shooto: 2/23 in Korakuen Hall| | align=center| 3| align=center| 5:00| Tokyo, Japan| |-| Win| align=center| 4-2-1| Alfonso Alcarez| Technical Submission (Triangle Choke)| Shooto: Treasure Hunt 11| | align=center| 2| align=center| 3:04| Tokyo, Japan| |-| Draw| align=center| 3-2-1| Kentaro Imaizumi| Draw| Shooto: Wanna Shooto 2002| | align=center| 2| align=center| 5:00| Setagaya, Tokyo, Japan| |-| Win| align=center| 3-2| Ryan Diaz| Decision (Unanimous)| Shooto: Wanna Shooto 2001| | align=center| 2| align=center| 5:00| Setagaya, Tokyo, Japan| |-| Loss| align=center| 2-2| Hiroaki Yoshioka| Submission (Armbar)| Shooto: R.E.A.D. 7| | align=center| 2| align=center| 3:43| Setagaya, Tokyo, Japan| |-| Win| align=center| 2-1| Takeyasu Hirono| TKO (Cut)| Shooto: R.E.A.D. 4| | align=center| 1| align=center| 4:17| Setagaya, Tokyo, Japan| |-| Loss| align=center| 1-1| Mamoru Yamaguchi| Decision (Unanimous)| Shooto: Renaxis 2| | align=center| 2| align=center| 5:00| Tokyo, Japan| |-| Win| align=center| 1-0| Masaki Nishizawa| Decision (Unanimous)| Shooto: Gig '99| | align=center| 2| align=center| 5:00| Tokyo, Japan|