Here is a list of Arai's best fights. For a list of Arai's losses, refer to "Jo Arai Losses".
On September 19, 2022 Jo Arai fought Junji Ito in a strawweight title fight for Ito's Shooto Championship title. Arai was 24 years old and with a record of 9-10-1 (7), and Ito was 36 years old and with a record of 17-10-2 (12). Arai stopped Junji Ito via 1st-round TKO and is crowned the new strawweight world champion.
On March 19, 2023 Jo Arai faced off against Yuto Sekiguchi in a flyweight bout at age 25. He was coming in with a record of 11-10-1 (8). Arai won the fight via 3-round unanimous decision.
On June 26, 2021 Jo Arai faced off against Tateo Iino in a flyweight bout at age 23. He was coming in with a record of 6-10-1 (4). Arai stopped Tateo Iino via KO.
On May 22, 2022 Jo Arai faced off against Ryohei Kurosawa in a flyweight bout at age 24. He was coming in with a record of 8-10-1 (6). Arai stopped Ryohei Kurosawa via TKO.
On July 23, 2023 Jo Arai met Shuto Aki in a strawweight (Shooto Championship) title defense fight. Arai was 25 years old and with a record of 12-10-1 (9). Arai stopped Shuto Aki via 1st-round TKO and successfully defended his title.
On November 27, 2022 Jo Arai faced off against Yo Otake in a flyweight bout at age 24. He was coming in with a record of 10-10-1 (8). Arai stopped Yo Otake via KO.
