Jo Arai

is a Japanese mixed martial artist who competes in Shooto and Rizin. He is a former Shooto Flyweight Champion and Strawweight Champion.

Mixed martial arts career Shooto In his MMA debut, Arai faced Ryosuke Ogawa at Professional Shooto 3/21 on March 21, 2016. The match ended in a draw.

Arai faced Takamasa Kiuchi at Professional Shooto 2022 Vol. 1 on January 16, 2022. He won the bout by first-round knockout.

Arai faced Ryohei Kurosawa at Professional Shooto 2022 Vol. 3 on May 22, 2022. He won the bout by technical knockout via doctor stoppage in the second round.

Strawweight and Flyweight champion Arai faced Junji Ito for the Shooto Strawweight Championship at Professional Shooto 2022 vol. 6 on September 19, 2022. He won the fight by a first-round knockout to win the title.

Arai faced Yo Otake at Professional Shooto 2022 Vol. 7 on November 27, 2022. He won the bout via first-round knockout.

Arai face Yuto Sekiguchi at Professional Shooto 2023 Vol. 2 on March 19, 2023. He won the bout by unanimous decision.

In his first strawweight title defense, Arai faced No. 1 ranked strawweight Shuto Aki on July 23, 2023, at Professional Shooto 2023 Vol.5. He defended the title by knockout in the 1st round. In October 2023, he reached No. 1 in the strawweight rankings according to Fight Matrix.

Arai faced Wataru Yamauchi for the vacant Shooto Flyweight Championship on November 19, 2023, at Professional Shooto 2023 Vol.7. He won the bout by technical knockout in the third round to win the title.

Arai vacated the Shooto strawweight title on November 30, 2024, after moving up to flyweight.

Arai was scheduled to face interim champion Yuto Sekiguchi in a Shooto Flyweight Championship unification bout at Professional Shooto 2025 Vol. 3 on May 18, 2025. However, he was forced to withdraw due to a right hamstring injury and a hematoma in his right hamstring, and relinquished his flyweight title and that Sekiguchi was promoted as undisputed flyweight champion as a result.

Post-title reign Arai faced Koyuru Tanoue on November 16, 2025, at Shooto 2025 Vol.9. He won the bout by unanimous decision.

Rizin FF Making his Rizin debut, Arai faced Hiroya Kondo on December 31, 2023 at Rizin 45. He lost the bout in the second round via TKO stoppage.

Arai faced Nkazimulo Zulu on September 29, 2024 at Rizin 48. He lost the bout via TKO in the first round.

Arai faced Lee Jung-hyun on March 7, 2026 at Rizin 52. He lost the bout by TKO in the first round.

Championships and accomplishments Shooto Shooto Flyweight Championship (One time) Shooto Strawweight Championship (One time) First simultaneous two-weight Champion in Shooto history

Mixed martial arts record Loss

Lee Jung-hyun TKO (knees and punches) Rizin 52

Tokyo, Japan Win

Koyuru Tanoue Decision (unanimous) Shooto 2025 Vol.9

Tokyo, Japan Loss

Nkazimulo Zulu TKO (spinning wheel kick and punches) Rizin 48

Saitama, Japan Loss

Hiroya Kondo TKO (head kick and punches) Rizin 45

Saitama, Japan Win

Wataru Yamauchi TKO (punches) Shooto 2023 Vol.7

Tokyo, Japan Win

Shuto Aki TKO (punches) Shooto 2023 Vol.5

Tokyo, Japan Win

Yuto Sekiguchi Decision (unanimous) Shooto 2023 Vol.2

Tokyo, Japan Win

Yo Otake KO (punches) Shooto 2022 Vol.7

Tokyo, Japan Win

Junji Ito TKO (punch) Shooto 2022 Vol.6

Tokyo, Japan Win

Ryohei Kurosawa TKO (doctor stoppage) Shooto 2022 Vol. 3

Tokyo, Japan Win

Takamasa Kiuchi KO (punch) Shooto 2022 Opening Round

Tokyo, Japan Win

Tateo Iino KO (punch) Shooto: Gig Tokyo Vol.30

Tokyo, Japan Win

Yuya Tsumura Decision (unanimous) Shooto 2020 Vol. 7

Tokyo, Japan Win

Atsushi Makigaya Decision (unanimous) MOBSTYLES 20th Anniversary Tour: Fight＆Mosh Vol.2

Tokyo, Japan Win

Yo Otake KO (punch) Shooto: Gig Tokyo Vol.28

Tokyo, Japan Loss

Takeru Uchida Submission (rear-naked choke) Shooto 30th Anniversary Tour 6th Round

Tokyo, Japan Win

Simon Tse Submission (rear-naked choke) KROSSxOVER 5

Saitama, Japan Loss

Tomoharu Umezawa Submission (arm-triangle choke) Shooto Infinity League 2018 Finals

Tokyo, Japan Loss

Yohei Komaki Submission (rear-naked choke) Professional Shooto 7/15

Tokyo, Japan Loss

Sho Nishida Submission (triangle choke) Shooto: Gig Tokyo 25

Tokyo, Japan Loss

Koha Minowa Submission (rear-naked choke) Shooto Korakuen Hall 3/25

Tokyo, Japan Loss

Qing Wang Submission (guillotine choke) WLF W.A.R.S. 18

Barkam, China Loss

Atsushi Makigaya Submission (armbar) Tachikawa Kakutogi Fest: Summer 2017

Tokyo, Japan Loss

Tomoaki Ota TKO (punches) This Is Shooto, Vol. 1

Tokyo, Japan Loss

Satoru Date TKO (punches) CMA x Kingdom Ehrgeiz: In Tachikawa Colosseum Voltage 1

Tokyo, Japan Loss

Gexi Sanlanggexi Submission (rear-naked choke) WLF E.P.I.C.: Elevation Power in Cage 8

Zhengzhou, China Win

Tomoharu Umezawa KO (punches) Gig Tokyo 21

Tokyo, Japan Draw

Ryosuke Ogawa Draw (majority) Professional Shooto 3/21

Tokyo, Japan