There are more than one artist who use "J" as their name.

1. Jun Onose, or J, is the former bassist of the Japanese band LUNA SEA. He was born August 12, 1970. He still plays bass, but also sings lead vocals in his own band.

2. J (real name Jani Savolainen is finnish musician who plays mainly guitar and is composing music. He is born in January, 8, 1982. He is also capable of playing bass.
He have played in Refrain named band. Nowdays Jani plays in band called Project Silence and Moukka.

3.. J is a rapper from Stuttgart. He made his first appereance on the "Lass Spitten EP" from Ronald & Ca$.
At the time he was working on a mixtape called "Mein Mixtape".

4. J is a South African rock artist, making his 2006 debut with the album "Closure" released by Just Music. The album is notable for being released on CD and USB memory stick.

5. J (제이) (Jung Jae-young) is a bilingual Korean female singer. Her music generally consists of R&B styled tracks. Her latest album was released in 2007, and she has more recently been featured in many R&B/hip-hop songs.

6. J is an popular artist on ニコニコ動画 (Nico Nico Douga), a Japanese video sharing website.

7. J is a Singaporean guitarist who is currently in the Death Metal band, Theobusion. He also does his own solo releases, recording from his home in Singapore.

8.J is Jawad , vocalist from the Bangladeshi band '71.

9. J (jay) is a terrible nickname given too the singer Jelte Tuinstra by his friends. He's also called Jay Tilla, Tilla, Tuin and Jay Tilla de Hunk