Here is a list of Iwasa's best fights. For a list of Iwasa's losses, refer to "Ryosuke Iwasa Losses".
On December 7, 2019 Ryosuke Iwasa fought Marlon Tapales in a super-bantamweight world-title fight for Tapales' IBF title. Iwasa was 29 years old and with a record of 27-3 (17), and Tapales was 27 years old and with a record of 33-2 (15). Iwasa stopped Marlon Tapales via 11th-round TKO and is crowned the new super-bantamweight world champion.
On October 27, 2012 Ryosuke Iwasa faced off against David De La Mora in a bantamweight bout at age 22. He was coming in with a record of 13-1 (9), and De La Mora was 23 years old and with a record of 24-2 (17). Iwasa won the fight via 10-round unanimous decision.
On October 25, 2021 Ryosuke Iwasa faced off against Genesis Servania in a super-bantamweight bout at age 31. He was coming in with a record of 28-4 (18), and Servania was 30 years old and with a record of 34-3 (16). Iwasa stopped Genesis Servania via KO.
On September 13, 2017 Ryosuke Iwasa fought Yukinori Oguni in a super-bantamweight world-title fight for Oguni's IBF title. Iwasa was 27 years old and with a record of 24-2 (16). Iwasa stopped Yukinori Oguni via 6th-round TKO and is crowned the new super-bantamweight world champion.
On March 3, 2012 Ryosuke Iwasa faced off against Yuki Murai in a bantamweight bout at age 22. He was coming in with a record of 11-1 (8). Iwasa stopped Yuki Murai via KO.
