2005 AIG Japan Open Tennis Championships – Women's Singles

Maria Sharapova was the two-time defending champion, but decided not to participate that year. Second-seeded Nicole Vaidišová was leading 7–6(7–4), 3–2 in the final against third-seeded Tatiana Golovin, when Golovin retired due to an achilles tendon injury, giving Vaidišová the title. This remains one of the youngest finals in WTA history.

2005 AIG Japan Open Tennis Championships – Women's Singles

Maria Sharapova was the two-time defending champion, but decided not to participate that year. Second-seeded Nicole Vaidišová was leading 7–6(7–4), 3–2 in the final against third-seeded Tatiana Golovin, when Golovin retired due to an achilles tendon injury, giving Vaidišová the title. This remains one of the youngest finals in WTA history.