Okada Yumiko (岡田 結美子), née Abe Yumiko (安倍 結美子, born June 22, 1970) is a Nihon Ki-in female professional Go player.
1p: 1989, 2p: 1992, 3p: 1994, 4p: 1996-07-08, 5p: 2001, 6p: 2003-07
Okada is the daughter of Abe Yoshiteru and is married to Okada Shinichiro.
She won the 2002 Female Strongest / Women's Saikyo and was runner up in 2004.
In 2007, she won the 13th Ricoh Pair Go Cup with Yamada Kimio.
She was one of the thirteen players in the inaugural Female Legends Teikei Cup of 2021, in which she beat Sakakibara Fumiko in the first round but was knocked out by Hosaka Mayu in the second.
Gobase page http://gobase.org/information/players/?pp=Abe%20Yumiko.
Nihon Ki-in page, with photo http://www.nihonkiin.or.jp/player/htm/ki000293.htm.