Kyoko Hagi

The fourth installment of G-men of Japan

A film adaptation of Rikuo Honjo's novel "Ishikari River".

The masked hero 'Moon Light Mask' battles the villainous 'Skull Mask' and his numerous masked henchmen who are trying to steal the secrets of the deadly HO evaporation bomb. This movie is part one of a two-part story arc that continues in the second movie.

Tatsuo Torigoe, the president of Torigoe Industries, attempts suicide but survives and reveals his motives for suicide to his only daughter, Akiko.