Recommend songs?

Hey guys, I just recently started listening to Japanese music cause of anime
The songs I listen to so far are Uso and Rain by SID, Again by YUI and Shunkan Sentimental by Scandal(yes all are from Fullmetal Alchemist: Brotherhood xD).
I'm looking to expand my playlist, does anyone have any good recommendations? I think my preference lies in rock/pop music

I cannot help you with songs, but as far as "Jap" is concerned...

=> Jap

Hmm. Judging from the songs you mentioned, I think you might like these artists/bands:

Flumpool, Gackt, Tamaki Nami.

If you fancy something heavier, you might want to look into more visual kei bands. I like

The Gazette

and

Merry.

And I don't know if you'll like them, but I really do, so have a listen to

Babymetal.