The Yakuza soundtracks are fantastic. If I'm not mistaken, the team behind the F-Zero GX soundtrack also worked on this series? At the very least, the (English) opening to Yakuza 0 sounds like something from it.
Edit: The Super Monkey Ball: Banana Blitz soundtrack is also rockin', yo.
In case you're wondering why Kiwami 2 isn't listed, it's because SEGA still hasn't made an official release of that soundtrack.
6 does have an Official Soundtrack, but for some reason it's not available digitally.
Good morning, fellow Canuck! They’re up. Search the Japanese title (龍が如く) and you’ll find them.
For everyone in this thread: Looks like Spotify themselves made an official Yakuza playlist!! Be sure to follow and listen to that, because that’ll let them know how much we appreciate them getting these tunes onto the service!
Looks like this release of the Yakuza music onto Spotify coincides with the release of the single for the Yakuza Like a Dragon opening, which is song number 1 on that playlist. It’s called “一番歌” or “ichiban uta” (“Ichiban’s Song” or “Ode to Ichiban”). Give it a listen!