Arata Mizuno
Featherweight (66kg) · Japan · DEEP
A southpaw all-rounder who works behind his 183cm frame and 178cm reach. His nine wins break down as 2 KO, 1 submission and 6 decisions.
A unanimous (5-0) decision over former champion Juntaro Ushiku at DEEP 131 on May 4, 2026 to claim the DEEP interim featherweight title.
Record & stats
| Division | Featherweight (66kg) |
|---|---|
| Categories | MMA |
| Promotion | DEEP |
| Nationality | Japan |
| Born | Mitaka, Tokyo |
| Team | Free agent (trains at T-GRIP TOKYO; listed as "jomma" by RIZIN) |
| Pro debut | 2023 |
| Height | 183cm6′0″ |
| Reach | 178cm5′10″ |
| Stance | southpaw |
| Age | 23 |
| KO rate | 33% |
| Status | Active |
How the wins come
33% Finish rate- 2 KO/TKO · 22%
- 1 Submission · 11%
- 6 Decision · 67%
Recent results
- Lvs Kaiwen LiKaiwen Li stops Mizuno with a left hook and follow-up hammerfists, R1 4:27
Auto-linked from KIAI's event coverage — updated as fights are decided.
Titles & honors
- DEEP interim featherweight title (won May 4, 2026)
- 2025 DEEP featherweight Grand Prix winner
Biography
Arata Mizuno is the DEEP interim featherweight champion with a record of 9-1 (as of August 11, 2026, before RIZIN.54). The 23-year-old southpaw makes his RIZIN debut against Kaiwen Li at RIZIN.54.
Born January 4, 2003 in Mitaka, Tokyo, Mizuno played baseball through high school and had no combat-sports background before turning to MMA during the COVID period, after watching Mikuru Asakura's YouTube channel. He fights as a free agent and trains at T-GRIP TOKYO (RIZIN's official listing shows "jomma").
Fighting style
At 183cm with a 178cm reach (per RIZIN's official listing), Mizuno is tall for featherweight and works behind that length as a southpaw all-rounder. His nine wins break down as 2 KO, 1 submission and 6 decisions — a fighter who builds rounds rather than chasing finishes.
Career
Mizuno turned pro with Fighting NEXUS in 2023, won his first three fights, and moved to DEEP in 2024. He won the 2025 DEEP featherweight Grand Prix, beating Ryogo Takahashi by decision in the final. In December 2025 he challenged Jin Aoi for the DEEP featherweight title and lost a split decision — the only defeat of his career, ending an 8-fight winning run from his debut. On May 4, 2026 at DEEP 131 he beat former champion Juntaro Ushiku by unanimous decision (5-0) to claim the interim title.
RIZIN.54
Mizuno faces Kaiwen Li in bout 1 of RIZIN.54 (featherweight, 66.0kg contract / RIZIN MMA rules, 5 min x 3 rounds) on August 11, 2026 at TOYOTA ARENA TOKYO — his first appearance in RIZIN.
Main sources: RIZIN official site, Wikipedia, Tapology, Sherdog, BoutReview. Figures as of August 11, 2026 (before RIZIN.54).
--- RIZIN.54 result (updated 2026-08-11): He lost to Kaiwen Li — stopped by Kaiwen Li's left hook and hammerfists (L TKO R1 4:27). Full card results: RIZIN 54 results.
Fight history
- LKaiwen LiL TKO R1 4:27
- WJuntaro UshikuW Decision (5-0)
- LJin AoiL Decision (split)
- WRyogo TakahashiW Decision
FAQ
- What is Arata Mizuno's record?
- 9-1 (2 KO, 1 submission, 6 decisions) as of August 11, 2026, before RIZIN.54. His only loss is a split decision to Jin Aoi in a December 2025 DEEP featherweight title fight.
- How tall is Arata Mizuno?
- 183cm with a 178cm reach per RIZIN's official listing — tall for featherweight. He fights southpaw.
- When is Arata Mizuno's next fight?
- No next fight announced as of August 11, 2026. He most recently lost against Kaiwen Li at RIZIN.54 on August 11, 2026.
- Is Arata Mizuno a DEEP champion?
- Yes — interim champion. He beat former champion Juntaro Ushiku by unanimous decision (5-0) at DEEP 131 on May 4, 2026, and also won the 2025 DEEP featherweight Grand Prix.