- Given Name: 三井雄一郎
- Amateur MMA Record: 1-0-0 (Win-Loss-Draw)
- Nickname: N/A
- Current Streak: 1 Win
- Age & Date of Birth: N/A
- Last Fight: June 03, 2017 in JMMAF
- Weight Class: Featherweight | Last Weigh-In: N/A
- Affiliation: Purebred Omiya
- Height: N/A | Reach: N/A
- Career Disclosed Earnings: $0 USD
- Born: N/A
- Fighting out of: Japan
Regional Rankings Rankings FAQ
Yuichiro Mitsui is ineligible for regional rankings due to inactivity.
Fighters must have at least one completed MMA bout in the past two years to be ranked.