The Mysterians (1957)

In Japan, scientifically advanced invaders from the war-destroyed planet Mysteroid cause an entire village to vanish, then send a giant robot out to storm the city by night, after which they request a small patch of land on Earth and the right to marry earthling women, claiming to be pacifists. Mankind must decide whether to capitulate or to resist.
Ishirō Honda
Kenji Sahara, Yumi Shirakawa, Akihiko Hirata, Momoko Kôchi, Yoshio Tsuchiya, Takashi Shimura, Yoshio Kosugi, Susumu Fujita, Fuyuki Murakami, Yutaka Sada, Hisaya Itô, Tetsu Nakamura, Sôji Ubukata, George Furness, Harold Conway, Heihachirô Ôkawa, Ren Imaizumi, Rikkie Sanjô, Tadao Nakamaru, Hideo Mihara, Takuzō Kumagai, Akio Kusama, Shin Ôtomo, Rinsaku Ogata, Takeo Oikawa, Mitsuo Tsuda, Kamayuki Tsubono, Senkichi Ômura, Haruya Katô, Yasuhiro Shigenobu, Shôichi Hirose, Eisuke Nakanishi, Keiichirô Katsumoto, Jirô Mitsuaki, Ryûtarô Amami, Saburô Kadowaki, Masayoshi Kawabe, Mitsuo Matsumoto, Hideo Unagami, Katsumi Tezuka, Haruo Nakajima, Ikio Sawamura, Sachio Sakai
tt0050251