Unseen Music are releasing this big compilation with contributions from Alva Noto, Ryuichi Sakamoto, Taylor Deupree, Robin Guthrie and many more ambient / pop / electronica artists. Available directly from the label as a digital release (mp3/flac) and as a CD (temporarily out of stock, to be repressed in September) or from iTunes and emusic Proceeds will go to the Japan Eartquake Relief Fund.
For Nihon - compilation sampler to benefit the Japan earthquake by Keith Kenniff - Helios