Japan has fallen under the control of the Tanuki. Anti-Tanuki citizens are caught one after another and people must monitor each other's behavior in order to stay safe. Meanwhile, in order to save Kitarō who had been turned to stone by the Gyōbu-Danuki's curse, Mana, Neko-Musume, and the others head for the underground again. Prepared to risk it all, Sunakake-Babaa, Konaki-Jijii and the others stay behind to hold the Tanuki back. Mana was left remaining, however, the curse placed on her by the Gyōbu-Danuki triggered, causing abnormalities to her body. At last, the Yō-Kaijū begins to destroy Japan. How will Kitarō and the others deal with this crisis!?