I learned about this in an email from New York-Tokyo. It's not only a free, legal download of 18 tracks, but a damn fine one. A terrific offer you should take advantage of.
Here's the basic info:
Ear To The Ground: Tokyo is an exclusive collaboration between LimeWire Store and New York – Tokyo. LimeWire Store’s Ear To The Ground series of FREE digital music compilations spotlights a different city for each release, and Ear To The Ground: Tokyo is the series’ 15th installment! New York – Tokyo has selected a group of artists that represent the current progressive music scenes of Tokyo. They are the tastemakers within their scenes: from their fashions to the artwork on their album covers, these creative artists are making an effort to stand out in the crowded urban setting of Tokyo.
And here's the link to the LimeWire website for Ear To The Ground: Tokyo.