The official webpage for Naoyuki Tomomatsu's Zombie Self-Defense Force (Zonbi jieitai - or "Zombie jieitai", if you prefer back-transliterations) is online, and there's a trailer for the movie on that page.
The screenplay for Zombie Self-Defense Force was written by Tomomatsu and Chisato Ôgawara. The movie's cast includes Miyû Watase, Hisakatsu Ôya, Jun Yamasaki, Shun Saeki, Mihiro, Kenji Arai, Yûya Takayama, Masayuki Hase, Kiyo Yoshizawa, Eriko Nagamine, and Yû Machimura.
GP Museum Soft K.K. (K.K. GP Myûjiamu Sofuto) is scheduled to release Zombie Self-Defense Force on sale DVD (DMSM-6652) in Japan on April 25th.
Tomomatsu's previous directing credits include Odoru yakuza: kumichô wa, watashi!?, Death Penalty Female Prisoner Saori (Akai tejô: shikeishû Saori) - a.k.a. "Red Handcuffs: Condemned Prisoner Saori" - Stacy, and Eat the School Girl: Osaka Telephone Club (Kogyaru-gui: Ôsaka terekura hen).
Zombie Self-Defense Force trailer (streaming RealMedia)
Zombie Self-Defense Force official webpage
Odoru yakuza: kumichô wa, watashi!? trailer (downloadable 4.2 MB WMV file)
Odoru yakuza: kumichô wa, watashi!? official webpage
VIEWER DISCRETION IS ADVISED
Death Penalty Female Prisoner Saori official webpage
Eat the School Girl: Osaka Telephone Club trailer (downloadable 7.7 MB MOV file)