But it certainly is very Japanese. It seems that many folks today in Japan just don't get the Heart Sutra. It also reminds me of so-called modern "Christian music." Or whatever they call it now.
Really, the form of the Heart Sutra - especially when chanted in Japanese - expresses nullity - I don't know what else to call it and a profundity of existence - and it expresses an identity of source and object language - that is unmatched.
A song and dance number of this sutra is like putting 3 heads on top of one that's already there.