Ren Hiramoto has three losses against three opponents on his MMA record. For a list of Hiramoto's best fights, refer to "Best fights of Ren Hiramoto".
On April 29, 2023 Ren Hiramoto faced off against Yutaka Saito in a featherweight bout at age 24. He was coming in with a record of 2-3 (0). Hiramoto lost the fight via 3-round split decision.
On March 6, 2022 Ren Hiramoto faced off against Chihiro Suzuki in a featherweight bout at age 23. He was coming in with a record of 0-2 (0), and Suzuki was 22 years old and with a record of 6-3 (3). Hiramoto lost the fight via 3-round unanimous decision.
On December 31, 2020 Ren Hiramoto faced off against Kyohei Hagiwara at age 22. He was coming in with a record of 0-1 (0). Hiramoto lost the fight via 2nd-round TKO.