Nathan's review:  Ninja-trained assassin, M (Reiko Ike), is dispatched to Yokohama with orders to kill Yakuza Boss, Hayami (Mikio Narita). But after missing her mark, Hayami turns the tables and dispatches his men under the leadership of Kawashima (Kenji Imai), to kill both M and his own president with whom he has grown tired. In 1974 'Toei Porno' had started to lose favour, leaving the two stars of the Pinky violence genre, Reiko Ike and Miki Sugimoto, with less work. Nikkatsu, capitalising on the martial arts boom that was exploding at the time, swept in with offers for both actresses, Sugimoto turned down 'Sukeban Deka: Dirty Mary', but Ike accepted 'Black Panther M' sensing an opportunity to stretch her legs as an actress under the promise that she wouldn't have any sex scenes and instead get a serious action film with which to make her name, distancing herself from her Toei reputation in the process (though fascinatingly Nikkatsu would choose to lab...