Not sure, aren't the names in the title? lol
Urushihara Yuuji Stage 2 Theme Part 2 <--- sounds like Naoto Shibata but I'm not positive.
The songs were probably made exclusively for the show.
No... Sasuke doesn't use songs made exclusively for it.. All the songs used come from other sources..
For example their Stage Clear music is a song called "Yagyu-Gaiden (
http://www.youtube.com/watch?v=ZjIGpqfjzzQ)" by a band called MUSASHI (
http://ja.wikipedia.org/wiki/六三四Musashi) off their "Yamato" album.
And for another example.. This (
http://www.youtube.com/watch?v=_XK-DGqeTb4) is Part 1 of Urushihara Yuuji's Stage 2 theme
EDIT: See? Proof of that part about Yuuji's Stage 2 theme
http://rapidshare.com/files/407925557/Urushihara_Yuuji_Stage_2_Theme.mp3.html
Might as well post the whole list again
http://www.youtube.com/watch?v=o-qKuvJj8wc
http://www.youtube.com/watch?v=W2aX4avOAYU
http://www.youtube.com/watch?v=htIW_kQtrcE
http://www.youtube.com/watch?v=uYp4z-Q4A6I
And a few people have asked me to look for this so I guess I'll ask XD
http://www.youtube.com/watch?v=Z54IObAXrKE