Maiko Inoue Sato (born 5 February 1979) is a Japanese former professional tennis player.
She is a younger sister of Haruka Inoue.A right-handed player, Inoue began competing on the professional tour in the late 1990s.
She left the tour in 2003, before returning in 2007 and featuring as a doubles specialist.
During her career she was most successful in doubles, with a best ranking of 139.
She made several WTA Tour main draw appearances in doubles and won nine doubles titles on the ITF circuit.
As a singles player she was ranked as high as 299 in the world, winning two ITF titles.Inoue, who retired in 2012, is married to former tennis player Bumpei Sato.