[11] Following his successful title defense, Komiyama extended his winning streak to 12, which culminated in a majority decision over Yuki.
[13] Komiyama was scheduled to defend his title for the second time at RISE 97, against Masanobu Goshu, whom he beat by majority decision.
Komiyama fought SHIGERU in the tournament final, and stopped his opponent by knockout in the second round.
He defeated Paulo Tebar by unanimous decision in the quarterfinal, but was unable to advance to the semifinals, as he had to be taken to the hospital due to a leg injury he had sustained during the bout.
[20] Komiyama took part in the 2018 K-1 Super Featherweight Grand Prix, being scheduled to fight Suarek Rukkukamui in the quarterfinal.
[21] In his next two fights, Komiyama defeated Masanobu Goshu by unanimous decision, and suffered a knockout loss to Leona Pettas.