[12] He snapped his losing streak at Krush 108, where Wajima won a unanimous decision against Daisuke Fujimura.
In the quarter final bout he faced Avatar Tor Morsri whom he defeated early in the third round with a leg kick knockout.
He would fail to capture the super welterweight title, losing to Kimura for the second time in his career.
[17] He was scheduled to fight Yuhei Fujioka during K-1 World GP 2020 in Tokyo,[18] and won by a second round head kick.
[21] Wajima challenged Minoru Kimura for the K-1 Super Welterweight title at K-1 World GP 2021 in Osaka on December 4, 2021.
[25] Wajima faced the former FFC Lightweight (70.3 kg) champion Meletis Kakoubavas in a non-title bout at K-1 World GP 2022 Yokohamatsuri on September 11, 2022.
The fight was stopped early in the opening round, as Wajima landed an inadvertent low blow on Kakoubavas.
[27] Wajima made his first K-1 Super Welterweight title defense against the four-weight Rajadamnern Stadium champion Jomthong Chuwattana at K-1 World GP 2023: K'Festa 6 on March 12, 2023.