I listen to a lot of Anime/Japanese Songs.
Most would only go to Youtube to find that catchy Opening/Ending song from that anime you last watched.
Some would even end up just seeing the opening version, Extended version and some Nightcore stuff with the pitch of the music changed.
Here I share where I get all my Anime/Japanese Songs.
Full albums containing the TV version to Full songs and other album contents relating the song.
Website Link: FuNiMe Forunesia
Here is a sample song of one of my favorite Ending songs.
Mikazuki - Sayuri - Ranpo Kitan Game of Laplace - ED