There are two artists with the name Keiko:
1) Yamada Keiko (Keiko Yamada - ????) is the vocalist of the J-Pop group Globe. In 1994 she participated in the 'EUROGROOVE NIGHT' audition organised by Tetsuya Komuro, and in 1995 became part of Globe. She later married to Tetsuya Komuro, and even has her own solo project. In 2001, She collaborated with Hamasaki Ayumi in the Songnation Project single a song is born.
2) KEIKO the band, hailing from Redditch, Worcestershire, UK.
Keiko formed in May 2004 and played their first show as a band less than a month later. Within four months the band were gigging across the country, and have gone on to play in excess of 200 shows from Edinburgh to Newquay and Cardiff to Norwich, and everywhere in between. Their inventive, energetic music combines a progressive attitude with a solid song-writing sensibility, and a desire to rock the balls off anyone who hears them. Their list of influences encompasses everything from Led Zeppelin to Biffy Clyro to Talking Heads to Luther Vandross, and then some.
The debut EP, The Rorschach Test was released in April 2006 on Lockjaw Records, coinciding with tours supporting Hundred Reasons and Hell Is for Heroes, and an appearance on the Snickers Bowl stage at the Download Festival.
Mark Stevenson left the band at the end of 2006, and was replaced by The Culprit drummer Joel Stanley. The band split up in April 2007, playing a final hometown show at the packed Liberal Club, which was filmed for DVD. They also sold a CD titled The Very Best of Keiko at the show, a compilation of material from all their previous demos. The original lineup reformed in 2009 for three live shows, but are now again no more, with the members pursuing other projects.
Keiko were: Tom Lynam (g/v), Nick Ebanks (b/v) and Mark Stevenson (d).
(With a brief stint for Joel Stanley on drums, in place of Stevenson)
Tom Lynam is now finding success playing drums for Pegasus Bridge. Nick Ebanks went on to form and front Idiosync.
3) On the EXIT TRANCE label there is also a singer named KEIKO.