Here is my archive of soundcloud freebies since 2011 or even 2010. It already consists of more than 900 tracks, primarily electronic music (from mild house to harsh hardcore) from japanese artists.
Current version: 5.0
Upgradable: Yes, from 2.0 upwards.
Overview: One of the most known circles established by Masayoshi Minoshima. Dance music touhou arranges (made by Masayoshi Minoshima, Nhato, Tsukasa, REDALiCE, Syrufit, t+pazolite etc) and charming female vocals by Mei Ayakura, mican*, Nachi Sakaue, nomico, 3L and many more — you can find it all here.
Current version: 3.0.
Overview: Otographic Music is a Japanese EDM label run by Kenji Sekiguchi. It was started in 2009 and has a focus on high-quality progressive house and trance music. The label is probably the most major trance/house label in Japan and is also known outside of Japan. Artists: Nhato, aran, Hiroyuki ODA, KaNa, Kazusa, KIWAMU, Kyohei Akagawa, Masanori Yasuda, OCOT, Ryunosuke Kudo, Shingo Nakamura, Tin5ha.
official site, Otographic releases can be bought in digital format from beatport, Amazon etc.
Current version: 3.0.
Overview: Diverse System is a pioneer doujin label that has been active since 2000. Originally, beatmania-related remixes were the main activity of the circle, but in the end of 2010 they received a complaint letter from KONAMI and suspended the activity. It was a turning point for the label’s life, YsK439 started recruiting various electronic composers from all over Japan (now the circle is getting work submissions from other countries as well) and decided to divide future albums genre-wise. To name a few: techno, trance, house, drum’n’bass, EDM, experimental, fusion, ambient, and so on. Thanks to the wise label policy and extremely talented composers, Diverse System became the biggest doujin label creating electronic music and is now recognized worldwide.
Current version: 2.0.
Overview: LiLA’c Records is a doujin circle focused on dance-music touhou arranges. Genres vary from psy-trance, handsup trance, d’n’b’, progressive trance to hardcore. Members: Irus, lapix; guests arrangers: cittan*, kirin, Tracy, sumijun, Hedonist and other. A lineup of vocalists includes Nana Mitani, hotaru, Kano, ℃iel, nanahira, koko and many more.