Education
She graduated from Kaetsu Women"s Junior High and High School (now Kaetsu Ariake Junior High and High School), but left Kaetsu Women"s Junior College (now Kaetsu University Junior College) before she finished.
岩井 由紀子ゆうゆ
She graduated from Kaetsu Women"s Junior High and High School (now Kaetsu Ariake Junior High and High School), but left Kaetsu Women"s Junior College (now Kaetsu University Junior College) before she finished.
She was also half of the popular group Ushiroyubi Sasaregumi, a spin-off group of Onyanko Club. She is the younger in a set of identical twins. About this time, she acquired the nickname "Yuuyu".
Yukiko Iwai performed the lead vocals for Onyanko Club"s fifth single, Osaki ni Shitsurei, released in July 1986.
From that point, she became the main vocalist for the majority of their albums, and was considered central to the success of the group. She made her solo debut with the single Angel Bodyguard (天使のボディーガード, Tenshi no Bodīgādo) on March 25, 1987.
In April of that same year, Ushiroyubi Sasaregumi was disbanded because Takai graduated from Onyanko Club and moved on to other things. Onyanko Club itself disbanded in August later that year, and Iwai began working for Watanabe Productions (Nabe Pro) along with fellow Onyanko Club member Sonoko Kawai.
She also began working under her nickname "Yuuyu", turning it into a stage name.
Yūyu no Quiz de Go! Go! (Taito arcade game released in 1990, ported for the Super Famicom in 1992).
Onyanko Club]
Iwai was a member of the all-girl popular group Onyanko Club (from June 21, 1985 until August 31, 1987), and she was the shortest of all the members at 150 centimetres (4 ft 11 in). On June 21, 1985, she became the 19th member of Onyanko Club after auditioning on the television program Yūyake Nyan Nyan, and she appeared on the cover of their first album, Kick Office. Shortly afterward, she and Mamiko Takai, also a member of Onyanko Club, formed the group Ushiroyubi Sasaregumi.