Iwai Yukiko

 (岩井由紀子) is a former Japanese idol, a former actress, a former talento, a former member of Onyanko Club, and the sub-unit Ushiroyubi Sasaregumi.

Her member number was 19.

She joined Onyanko Club on June 21, 1985, and graduated on September 20, 1987, where the group disbanded.

She graduated from Ushiroyubi Sasaregumi on April 5, 1987, where the group disbanded.

She retired from the entertainment industry in 1997 after she married.

Albums

 * 1) [1987.07.29] Yuuyu Kosen (ゆうゆ光線)
 * 2) [1987.12.16] Iyaa! (いやッ！)
 * 3) [1988.07.21] Summer Tasty
 * 4) [1988.12.14] KOTTERU NE! (KOTTERUネ！)

Best Albums

 * 1) [1989.03.21] Best da Mon ne! (ベストだもんね！)
 * 2) [2002.02.20] MY COLLE!CTION YUUYU BEST (Myこれ！ クションゆうゆBEST)
 * 3) [2004.05.19] Ushiroyubi Sasaregumi Uta no Daihyakka Sono 3 Yuuyu (うしろゆびさされ組 うたの大百科 その3 ゆうゆ)
 * 4) [2007.08.17] YUUYU SINGLES COMPLETE (ゆうゆ SINGLES コンプリート)
 * 5) [2010.04.21] My Kore! Lite Yuuyu (Myこれ！ Lite ゆうゆ)

Singles

 * 1) [1987.03.25] Tenshi no Bodyguard (天使のボディーガード)
 * 2) [1987.07.22] -3℃
 * 3) [1987.10.28] 25 Cent no Mangetsu (25セントの満月)
 * 4) [1988.01.21] Tsuite Ikenai -Ganbare Boyfriend- (ついて行けない-がんばれボーイフレンド-)
 * 5) [1988.04.21] Hidari Mune Atari (左胸あたり)
 * 6) [1988.07.27] Sayonara Shigan (サヨナラ志願)
 * 7) [1988.11.30] Hoshizora no Gangster (星空のギャングスター)
 * 8) [1989.02.08] Mou Ichido Peter Pan (もう一度ピーターパン)

Video Releases

 * 1) [1987.09.21] Buongiorno! Yuuyu Italia Pack Tour (ボンジョールノ！ ゆうゆ イタリア・パック・ツアー)
 * 2) [1988.03.01] Yuuyu First Concert Bokura wa Genki na Yuuyu In (ゆうゆファーストコンサート ボクらは元気なゆうゆ印)

Video Games

 * 1) [1992.07.10] Yuuyu no Quiz GO!GO! (ゆうゆのクイズでGO!GO!)

Photobooks

 * 1) [1987.06.25] Yuuyu - Iwai Yukiko Shashin-shuu (ゆうゆ - 岩井由紀子写真集)
 * 2) [1988.03.01] Hidari Mune Atari - Iwai Yukiko Shashin-shuu (左胸あたり - 岩井由紀子写真集)
 * 3) [1991.10.01] Yukiko Ama Iro no Toki - Yuuyu Shashin-shuu (由紀子 亜麻色のとき - ゆうゆ写真集)

Trivia

 * She's the mother of three children.