You may be thinking, "Hey, you already made a music part!"
Well, that covered English bands.
I also enjoy listening to Japanese bands and artists.
I thought I would list my favorites here.
I won't list my favorite bands/artists in order. I will just list the ones I like.
So, here are my favorite Japanese bands and artists!

Goose House

While I was watching an anime called, "Your Lie in April", I fell in love with their opening song, "Hikaru Nara".
I decided to search for the artists behind the opening song and discovered Goose House. I am extremely new to their content, but they are a great cover band that also creates their own songs. They are a happy group that look like they enjoy their music. I enjoy their song, "Sing" a lot.

Vocaloid

I have been listening to Vocaloid music for 4 years! Each Vocaloid has their own set of unique songs, ranging from happy beats to dark stories. I love all the Vocaloids, but Miku is my favorite. If you have ITunes, I recommend buying the album, "Delicious" by minato. My favorite Vocaloid songs are Double Lariat, Delicious, and StargazeR, but I have so many!

"What!?" You cry, "You only listen to two Japanese groups?"
Well, it is difficult for me to discover new Japanese artists. I don't have friends that listen to Japanese music (that I know of.)
I don't want to look up, "Best Japanese Groups and Artists." online because there would be too many groups to choose from. I would have to spend lots of time listening to different groups.
If you know any Japanese artists/groups, leave your favorite in the comments!