Some info (like tracklist) can be found on this auction:
http://auction.item.rakuten.co.jp/10601946/a/10052603/
Not sure how reliable it might be, but these are the credits:
編曲・演奏／水谷薫(2)～(6)、ウルトラマンクラブバンド(1)(8)(9)
歌／ウルトラマンクラブバンド(1)
It's the only site that mentions "水谷薫" with "POCH-2009", and only as arranger. 水谷薫 is a composer for the Ultraman series, but do we know for sure he scored this game?