The official webpage for Hiroyuki Kawasaki's Shichinin no kunoichi: oniyasha is online, and there's a trailer for the movie here [viewer discretion is advised]. The movie stars Hiroko Saiki, Mayumi Hirose, Kozue Ikeda, Yôko Satomi (who is in Kei Nakata's Muhito: The Matchless Man (Muhito), and was in both Daisuke Yamanouchi's Kyoko vs. Yuki (Saikyô joshikôsê densetsu: Kyôko vs Yuki ["joshikôsê" = joshikôsei]) and his Girl Hell 1999 (Shôjo jigoku ichi kyû kyû kyû)), Kumiko Watarai, Sayaka Kitagawa [viewer discretion is advised], Chihiro, Reika Aoyama, and Yui Mamiya.
Hiroyuki Kawasaki's SHICHININ NO KUNOICHI: ONIYASHA