Are there any more good Japanese artists I should put in my iPod? (kinda long)?

Some J-pop/Asian artists I listen to (that aren't included on your list) are Hitomi, day after tomrrow, Namie Amuro, Puffy AmiYumi, Ami Suzuki, Splash Gold, Max, beni arashiro, Boa (her pre-American album release material), dream, Hiro, and m-flo. Enjoy!