I have to mention mafumafu, his cover of ROKI is what got me into Japanese music to begin with! I mostly listen to cover artists and vocaloids... a lot of chogakusei, forte, araki, soraru, takaokamizuki, and yasai31!
食べ物大好きw (01月26日, 7:00)
I came across a late Japanese producer/artist named Nujabes, and his music is so great
I would recommend listening to Battlecry, Luv(sic) no.1, and the space between two world.
No way lol you found it finally. Nujabes being recognized. If you have played the game 'Stray' the cat game then there is one music that is kinda taken from nujabes song [counting stars]
I really like Ado, her voice is amazing, LiSa, and Kenshi Yonezu
All the others are groups (phantom siita, babymetal, etc) or Vocaloid Producers (mothy, Kanaria, CircusP, Deco*27, wotaku, and Neru are my favorites, I also like Syudou and lots of others :D)