Bayan kammala karatun sakandaren Takigawa Daini a shekara ta 2004, Okazaki ya sanya hannu kan cikakkun sharuɗɗan ƙwararru tare da Shimizu S-Pulse a shekara mai zuwa. A watan Disamba na 2005, ya yi wasan farko na J.League a matsayin mai maye gurbin Sanfrecce Hiroshima. A ranar 15 ga Afrilu 2007, ya zira kwallaye na farko na ƙwararru a kan Kawasaki Frontale. Okazaki ya ƙare kakar wasa ta farko a matsayin ɗan wasan farko tare da kwallaye uku daga wasanni 13. Tambaya: Yaushe ya kammala makarantar sakandare?
Shekarar 2004