Keiko Matsui (松居慶子?), born in Tokyo as Keiko Doi on July 26, 1961 (or 1963), is a Japanese smooth jazz/new age/Chill-out music keyboardist and composer whose career spans three decades, during which time she has released twenty CDs (in addition to various compilations) and has received international acclaim.
Keiko and her husband Kazu Matsui (b. June 5, 1954) have two daughters, Maya (b. ca. 1988) and Mako (b. Sep 12, 1995).