Yakuza 4 Background Music Identification

There’s a ton of music that plays in the stores and various locations in Yakuza 4.I know some may not be from Sega games or games at all, but I was hoping you guys and gals with all your wisdom could help I.D some of the songs.If you want a rip of the soundtrack, here’s the link.The Usen link has the music in question.
Thread 84846

Here’s a few to start, I’m sure they’re from the same source.

Playing: usen_a1_01.mp3 – picosong (http://picosong.com/qMJi)
Playing: usen_a1_02.mp3 – picosong (http://picosong.com/qMJ7/)
Playing: usen_a1_03.mp3 – picosong (http://picosong.com/qMSq/)