I’m not a real music critic but I know a thing or two about Japanese language and culture: perhaps you may find some interesting details in these analysis. At the moment they are not many, but I plan to do more in the future, you’ll find the link to them right under:
Dadaroma – dadaism#1: a brief review
Dadaroma – 「雨のワルツ」 (Ame no Waltz): a brief review