Gendou - MP3. (Registration required.)
T̶e̶n̶s̶h̶i̶ ̶-̶ ̶M̶P̶3̶.̶ ̶(̶N̶o̶ ̶r̶e̶g̶i̶s̶t̶r̶a̶t̶i̶o̶n̶ ̶r̶e̶q̶u̶i̶r̶e̶d̶.̶)̶ (Dead)
LosslessONE - FLAC. (Currently on hiatus.)
Nippon Nation - Both MP3 and FLAC. (Dead)
Nipponsei - MP3.
VNSharing - A Vietnamese site, but it hosts FLAC anime music. (Dead)
Ichigo's - Sheet music.
josh's - Sheet music.
NEET - Doujin music. (Dead)
Ultimate soundtr/a/ck - Ultimate HOTBLOOD Soundtr/a/ck and other compilations.
R/a/dio - Online radio station for weeaboo music.
Eden Radio - Online radio station, same type of music as R/a/dio.
ASL - Anime-Sharing Lossless. Offers FLAC and MP3. DDL and Torrents.