WTA Tour

2004 - Won Hobart doubles title (w/Asagoe - their first pairing, and Okamoto's first Tour title, d. top seeds Callens/Schett in final); as a world No.246 qualifier at Vancouver, l. 1r to No.87 Groenefeld, as No.251 qualifier at Seoul, l. 1r to No.42 Asagoe, and failed to qualify at four other Tour events; on ITF Circuit, reached two doubles finals, winning one, and one singles final.
2005 - Won 10th, 11th and 12th career ITF Circuit doubles titles.

SINGLES
Finalist: 2005 - ITF/Taipei-TPE, ITF/Nagano-JPN, ITF/Gunma-JPN.

DOUBLES
Winner (0 WTA Tour): 2005 - ITF/Fukuoka-JPN (w/Fuda), ITF/Changwon-KOR (w/Chuang).
Finalist: 2005 - ITF/Taipei-TPE (w/Fuda), ITF/Gifu-JPN (w/Fuda), ITF/Makinohara-JPN (w/Takase), ITF/Busan-KOR (w/Takase).