Yoshinori Umeki

Professional MMA referee — 1,847 bouts officiated on record.

1,847

Bouts

445

KO/TKO

491

Submission

751

Decision

Finish rate (of decided bouts) 55 %

Where they've officiated

Recent bouts officiated

Yuto Shioya vs Kentaro Okumura 2026-04-25

Fighting Nexus - Nexus Mania 2026 · TKO (Corner Stoppage)

Subaru Mori vs Yuta Watanabe 2026-04-25

Fighting Nexus - Nexus Mania 2026 · TKO (Punches)

Ryo Yamazaki vs Yota Shionoya 2026-03-08

Fighting Nexus - Vol. 43 · TKO (Punches)

Takumi Hagishima vs Taiki Higuma 2026-03-08

Fighting Nexus - Vol. 43 · Decision (Unanimous)

Taiyo Ogawa vs Atsuki Takizawa 2026-03-08

Fighting Nexus - Vol. 43 · Decision (Unanimous)

Sho Oshima vs Hiroaki Mizoguchi 2026-03-01

Grachan - Grachan 81: Helios 3 · Decision (Unanimous)

Kuranosuke Sato vs Daiki Kuramizu 2026-03-01

Grachan - Grachan 81: Helios 3 · Technical Submission (Rear-Naked Choke)

Kaito Nozawa vs Takuya Hasegawa 2026-03-01

Grachan - Grachan 81: Helios 3 · Decision (Unanimous)

Hisashi Ezaki vs Kazuki Shibuya 2026-03-01

Grachan - Grachan 81: Helios 3 · Decision (Unanimous)

Yutaro Kamata vs Yuuki Kawabata 2025-11-22

Fighting Nexus - Vol. 41 · KO (Punches)

Ryosuke Nakagiri vs Rintaro Shimoda 2025-11-22

Fighting Nexus - Vol. 41 · Decision (Unanimous)

Takeji Yokoyama vs Takuma Sudo 2025-11-22

Fighting Nexus - Vol. 41 · Decision (Unanimous)

Tomoya Mizuguchi vs Tetsuya Izuchi 2025-11-03

Gleat MMA - Ver.Mega in Yokohama · Submission (Rear-Naked Choke)

Keigo Iwasaki vs Hwa Rang Park 2025-09-21

Gladiator - Gladiator 032 in Osaka · Decision (Unanimous)

Kouki Nakagawa vs Hwi Jae Lee 2025-09-21

Gladiator - Gladiator 032 in Osaka · Submission (Front Choke)