This is a little late, but the music from this game and LOT1 comes from the same guy(s). Pretty sure it is copyright-free since it has been used in a number of other games (Vanguard Princess, Material Sniper, Cosmic Break,.....).
Artist's name is "Rengoku Teien". Their music is most likely free since you can download it from their site.
Pretty goddamn obscure outside of Japan.