Can either be paid or free but most of them are paid.
Lossless and hi-res music.

Lossless and hi-res music that can even reach to the point that human beings can't listen due to high frequency (96kHz, 192kHz. etc...) so better be careful.
Used by a lot of audiophiles.
Only available in some countries.

Store in Japanese.
Lossless and hi-res music.

Store in Japanese.
May need a VPN to change location to Japan.
Lossless and hi-res music.

Store in Japanese.
Lossless and hi-res music.

Lossless and hi-res music but most of them are cd rips (lossless).
Features a lot of Touhou, rhythm game music and some other Japanese music.
Direct download.

A music blog that features albums from some popular Japanese doujin circles.
Lossless music (most of them are cd rips).
Torrent download (host on nyaa site).

Everyone's favourite multi-purpose site.
Lossless and hi-res music.
Features lots of up-to-date anime music albums.
Torrent download.

Lossless and Hi-res music but not all of them.
Features Vocaloid music.
Direct download.

A massive Touhou music collection.
Lossless music (cd rips).
Direct download.

Everyone's favourite place to download game music.
Lossless and game ripped music.
Direct download.

Music is as the server's name.
Lossless and hi-res music.
Direct download.

Can rip music from Deezer (cd quality) and qobuz (depends on the quality on the store website).
Dogshit search for Deezer ripper.

Can rip from more platforms but not so good.
Dogshit download speed.

Basically what Squidwtf's qobuz ripper based on now (It's good).
Quality is (maybe) as good as the official site.

Releases BMS compilation album of each year (mp3 320 quality).

A non-profit music label that features a lot of dariacore and breakcore or anything like that.

Download music files directly from other people's computer, as long as they're online.

A free, open source acoustic spectrum analyzer.

A free acoustic spectrum analyzer.

A free, open source torrent client.