In Blade, the two singers wore Japanese schoolgirls suits and the DJ
were playing in a New York club just before he stalks vempires.
You are right about it not being on the Soundtrack: the song is rare
and according to my very intensive search is called "Chin Chin". It is
preformed by a band called "Bang Wa Cherry". It was composed by Damien
Wagner and the DJ is DJ June.
I found this answer in a discussion group on industrial music, in
which a poster that goes by the name of Joe Oxford posted the
"According to sources, the song in “Blade” in which the
Japanese schoolgirls are singing is called “Chin Chin.” It
by Damien Wagner and performed by Bang Wa Cherry. The song was written
for the film and was sung by the girls you see in the movie. The DJ in
the movie is DJ June, who also did the DJ work for the track."
(Source: Joe Oxford, "Japanese girls in BLADE"
This post led me to many verifications, that "Chin Chin" is the song,
and Bang Wa Cherry is the band (for example:
http://www.clipland.com/Talk/archive_6.shtml , search the page using
CTRL+F to find "Blade").
You can hear (but not download) the song here
These seem to be in bad quality and recorded from the film (listen
also to http://www.eyetap.org/~maneesh/cherry.mp3).
However, it seems from my thorough investigations, that this band was
made up for the film, and that the song actually does not appear
anywhere official - only in these files, as well as some advices
lifted in various newsgroups on the hunt for the missing "Chin Chin".
It seems, that some people labled it as a "Shonen Knife" or "Cibo
Matto" song, as the first appears on the movie and the soundtrack (but
its style is more Ramones style, sweet grange), and the second does
music which is highly similar to that in the film (so similar, that
some people think that the girls are uncredited actresses, and the
song is actually done by Cibo Matto).
So, to sum up: you're looking for "Bang Wa Cherry", but since they are
a mystery, some think it is actually actresses "Kareoke-ing" Cibo
Matto. It is a Japanese girl (actually, women, the lead singer is 37)
band. The meaning of the name (in Italian) is "food madness", and a
little more gossip information tells me that Yuka Honda, their lead
singer, is the girlfriend of Sean Lennon (the son of John). Their
official homepage could be found here:
In a fan homepage, this FAQ appears:
"Did Cibo Matto appear in the Sound Track for the movie "Blade"?
No, Cibo Matto did not appear on the movie soundtrack for Blade!
Shonen Knife appears on the movie soundtrack for Blade. Miho recorded
a song with Arto Lindsay and Kat Bjelland for the movie soundtrack of
"Witchblade"." (Source: Cibo Matto FAQ,
By the way, as you can tell from the previous information, another
band that appears in Blade (and is also on the Soundtrack) is Shannon
Knife. If you like Japanese pop, you may like this one too, a rock-pop
band, that is a bit influenced by Western alternative music, but is
very Japanese. However, Shannon Knife do not do rap. Their song, "Ah
Singapore", is played in the club's kitchen.
More sources and discussions on the subject:
My search strategy was to look for blade with the terms such as "Asian
band" or "Japanese Band" and "Japanese Schoolgirls". Later, a search
was done also on the details of the individual terms revealed (bands,
DJs, songs, etc.).
I hope that answered your question. Please contact me if you need any
clarifications on the answer. I'd be pleased to clarify my answer
before you rate the question.