/r/hiphopjapan
A place dedicated to sharing news and music of the genba.
日本ヒップホップのシーン:海外の反応と評価
ビーフの話、PV、ニュースの投稿が大歓迎!
http://blog.livedoor.jp/colvics/ - Blog with most frequently updated new release information (Japanese)
https://twitter.com/nihongorapnews - Good twitter feed with latest Japanese hiphop news (Japanese)
http://thejapaneserap.com/ - Japanese rap fansite
/r/japanesemusic
/r/hiphopheads
/r/importedhiphop
/r/CreepyNuts
/r/nujabes
/r/mflo
/r/hiphopjapan