JRock
- BREAKERZ (oh you know I definitely will recommend them 1st & foremost as they're my most fave artiste to promote/support 8D Shame I'm the only 1 that's fiercely dedicated to them , people really don't know what they're missing out on , seriously
)
- Acid Black Cherry (chances are if you're in BREAKERZ's fandom , you bound to be in ABC's fandom as well xD)
- SPYAIR (Rockin' the World is amazing , my fave debut album that I came across last year & their sound's so fresh/unique)
- abingdon boys school
- NEVER LAND
- DAIGO☆STARDUST
- Fukuyama Masaharu
- GLAY
- Himuro Kyosuke
- Kuriyama Chiaki
- Saito Kazuyoshi
- school food punishment
- SID
- flumpool (their older works are still the best . I have not been impressed with their material after they released What's flumpool sadly)
- Aqua Timez
- L'Arc~en~Ciel
- Suga Shikao (he's 1 of the most unique if not awesome/talented artistes out there & his sound's just so different)
- Kobukuro (ok not really rock but they're more towards folk but still they're great xD)
- Anna Tsuchiya
- OLIVIA
JPop
- JASMINE
- Koda Kumi
- alan
- girl next door
- Kanon Wakeshima / kanon x kanon (I really don't know where to slot her in since her sound's so different until I wasn't sure :x)
- Matsushita Yuya
- Shota Shimizu
- Mika Nakashima
- Kuroki Meisa
- Hilcrhyme
- ON/OFF
- ayaka
- Aoyama Thelma
- BENI
- Ken Hirai
That should be about it . Since you didn't specify if you listen to girl groups or boybands , I wouldn't list them but if you do , sure xD