I've updated info, partially with help from these websites:
http://maru-chang.com/games/music.php/goemon_neo-momo/
http://www.music.ne.jp/~konami/cd/1997tm.html
and the useful booklet scans.
However, I dunno what to do about the composers. Apparently, these are the most likely composers of this game: 冨田朋也 (Tomoya Tomita)、荒木茂 (Shigeru Araki)、柏崎歩 (?)、加藤祐介 (Yusuke Kato)、三木彩子 (Saiko Miki) [all the previous ones make comments on Booklet 4] and probably 上原和彦 (Kazuhiko Uehara).
Sources:
http://bsm.hp.infoseek.co.jp/data-konami2a.html#goemon
I don't know who is Yusumasa Kitagawa and I doubt very much of his participation in this soundtrack.
柏崎歩 is very likely Wataru Kashiwazaki (
http://www.gmronline.com/info.asp?CatNumber=KICA-7943).
For confirm composer's involvement, I'd greatly appreciate some website/video with info about the credits of this game.