Morita Douji
Morita Douji (森田童子) was a Japanes folk singer from the seventies. I'm afraid I don't have the skills with to do her justice, so I'll just keep my mouth shut and let the music do all the talking.
Youtube Playlist: http://www.youtube.com/view_play_list?p=DFCDD6D2B978DAFD
Last.fm: http://www.last.fm/music/%E6%A3%AE%E7%94%B0%E7%AB%A5%E5%AD%90
fansite (in Japanese): http://www.gogorocket.jp/doji/h/
Album review: http://www.jrawk.com/Content/D/dojimorita/mothersky.html
Click to view^only live video I could find.