Ghidorah, the Three-Headed Monster

Police Detective Shindo (Yosuke Natsuki) is assigned to guard Princess Selina Salno of Selgina (Akiko Wakabayashi) during the Princess' visit to Japan, due to a suspected assassination plot. The supposedly deceased Selina turns up in Japan, without her royal garb (including the golden bracelet) claiming to be from the planet Venus, and preaching to skeptical crowds of forthcoming disaster. To combat the combined threats of the three monsters, the Japanese government enlists the aid of the Shobijin to summon Mothra (the surviving larva from the previous film)