Education
In 1992, Koiwai finished 8th in her debut at the World Junior Championships.
小岩井 久美子
In 1992, Koiwai finished 8th in her debut at the World Junior Championships.
Coached by Machiko Yamada, who had trained Midori Ito, Koiwai was routinely landing the triple axel jump by 1994. However, she faced several chronic injuries on her right foot, which severely impeded her efforts. In 1996, she made her only appearance at the senior World Championships, finishing 16th.
Koiwai graduated from Tokai Women"s College near her hometown, Nagoya.
She now works as a programming director for Tōkai Television in Japan.