Okazaki won the 2004 Shooto rookie tournament in 2004 and then disappeared for 18 months before returning with back-to-back wins over Hiroyuki Tanaka and So Tazawa in front of his hometown Osaka crowd, earning his Class A Shooto license, and firmly planting himself in the minds of Shooto fans while intensifying the 132-pound class.
[1] On October 18, 2009 Okazaki won Shooto's vacant 132-pound Pacific Rim Championship in the main event of Shooto GIG Tokyo 3 at Shinjuku FACE by beating Hiromasa Ogikubo via second-round TKO.
[2] Okazaki won the Shooto 132-Pound World Championship at Shooto Tradition 2011 on April 29, 2011 at Tokyo Dome City Hall when he defeated Shuichiro Katsumura by TKO (punches).
[3] On May 18, 2012 Okazaki made the first defence of his Shooto 132-Pound World Championship in a rematch with Ogikubo but was submitted in the third round.
[4] On April 10, 2013 it was announced that Okazaki had signed with ONE Fighting Championship.