Hmm... What about MiChi? Her songs are a little different from the others. Mixed with electro, pop, rock and sometimes has the 80's/90's feel. She also makes positive music and does cover songs (mostly 90's songs). She fluent in Japanese and English.
She has 3 albums: MiChi MadNesS, Up to You and recent one, THERAPY. I don't know how you'll feel about her but it's worth a shot.
