[2] Ozawa then won his next six fights, including a rematch with Kento Ito, before suffering the first professional loss of his career, dropping a majority decision against Hirotaka Asahisa.
[9] He successfully defended the Krush title for the second time against Yun Qi, winning by majority decision.
[10] Ozawa would then suffer back-to-back losses to Haruma Saikyo, losing both times by unanimous decision.
[11] Ozawa rebounded from this loss with a 49 second knockout of Yuzuki Satomi,[12][13] before losing to Jorge Varela in the 2018 K-1 Featherweight GP[14] and Ryusei Ashizawa three months later.
[16] He lost his next fight to Tatsuki Shinotsuka at K-1: K'Festa 4 Day 1 as well, dropping a split decision.
[17] Ozawa was scheduled to face Yuta Kunieda at K-1 World GP 2021: Yokohamatsuri on September 20, 2021.