| Katsuhiko Nagata 永田克彦 | |
| Birth Date: | 31 October 1973 |
| Nationality: | Japanese |
| Weight: | 154lb |
| Weight Class: | Lightweight |
| Reach: | 170.18cm (67inches) |
| Style: | Greco-Roman wrestling |
| Stance: | southpaw |
| Fighting Out Of: | Chofu, Tokyo, Japan |
| Team: | Wrestle Win |
| Years Active: | 7 |
| Mma Kowin: | 1 |
| Mma Decwin: | 5 |
| Mma Koloss: | 3 |
| Mma Subloss: | 2 |
| Mma Decloss: | 2 |
| Mma Draw: | 3 |
| Sherdog: | 14811 |
is a Japanese wrestler and mixed martial arts, who won the silver medal in the 69 kg Greco-Roman wrestling event at the 2000 Summer Olympics.[1]
He is also the brother of professional wrestler Yuji Nagata, who works for New Japan Pro-Wrestling (NJPW).
|-| Draw| align=center| 6–7–3| Koji Oishi| Draw (unanimous)| Pancrase: Impressive Tour 13| | align=center| 3| align=center| 5:00| Tokyo, Japan| |-| Draw| align=center| 6–7–2| Koji Oishi| Draw (decision)| Pancrase: Passion Tour 11 | | align=center| 2| align=center| 5:00| Tokyo, Japan| |-| Loss| align=center| 6–7–1| Katsuya Inoue| Decision (unanimous)| GCM - Cage Force 17| | align=center| 3| align=center| 5:00| Tokyo, Japan| |-| Win| align=center| 6–6–1| Koji Anjo| Decision (majority)| GCM - Cage Force 15| | align=center| 3| align=center| 5:00| Tokyo, Japan| |-| Win| align=center| 5–6–1| Daisuke Hoshino| Decision (unanimous)| GCM - Cage Force 13| | align=center| 3| align=center| 5:00| Tokyo, Japan| |-| Loss| align=center| 4–6–1| Kuniyoshi Hironaka| TKO (punches)| GCM - Cage Force 11| | align=center| 1| align=center| 3:41| Tokyo, Japan| |-| Loss| align=center| 4–5–1| Vítor Ribeiro| TKO (cut)| DREAM 8| | align=center| 1| align=center| 7:58| Nagoya, Japan| |-| Draw| align=center| 4–4–1| Yasunori Kanehara| Draw| GCM - Cage Force EX| | align=center| 3| align=center| 5:00| Tokorozawa, Japan| |-| Loss| align=center| 4–4| Naoyuki Kotani| Submission (heel hook)| ZST - ZST.18: Sixth Anniversary| | align=center| 2| align=center| 4:38| Tokyo, Japan| |-| Loss| align=center| 4–3| Shinya Aoki| Submission (mounted gogoplata)| Dream 4: Middleweight Grand Prix 2008 Second Round| | align=center| 1| align=center| 5:12| Yokohama, Japan| |-| Win| align=center| 4–2| Artur Oumakhanov| Decision (unanimous)| Dream 1: Lightweight Grand Prix 2008 First Round| | align=center| 2| align=center| 5:00| Saitama, Japan| |-| Loss| align=center| 3–2| Caol Uno| Decision (unanimous)| Hero's 9| | align=center| 3| align=center| 5:00| Yokohama, Japan| Hero's 2007 Lightweight Grand Prix quarter-final.|-| Win| align=center| 3–1| Isaiah Hill| Decision (split)| Dynamite!! USA| | align=center| 3| align=center| 5:00| Los Angeles, California, United States| |-| Win| align=center| 2–1| Shuichiro Katsumura| TKO (punches)| K-1 - Premium 2006 Dynamite!!| | align=center| 1| align=center| 4:12| Osaka, Japan| |-| Loss| align=center| 1–1| Yoshihiro Akiyama| KO (spinning back kick)| Hero's 5| | align=center| 2| align=center| 2:25| Tokyo, Japan| |-| Win| align=center| 1–0| Remigijus Morkevicius| Decision (unanimous)| K-1 - Premium 2005 Dynamite!!| | align=center| 2| align=center| 5:00| Osaka, Japan|