地球防衛軍
Although Tsuchiya appeared in many films by Akira Kurosawa, he also appeared in many science fiction films, saying "Most actors get comfortable with a certain genre, and they stick to that. But as far as I was concerned, it was equally prestigious to appear in science-fiction films or in Kurosawa movies." Tsuchiya especially liked to play aliens (or people controlled by aliens). When originally given the role of one of the heroes in "The Mysterians", he turned down the role in favor of the Mysterian leader, because he was only interested in playing "interesting, strong and/or twisted characters". When director Ishirō Honda told him that since the Mysterian leader wore a mask, his face would not be seen, Tsuchiya said "That's all right. I just want to play the alien!" He has a personal interest in space and even claims to have seen several UFOs. "At the time I was very interested in the Space Race, and belonged to an organization which promoted a mission to the moon. I got all my fellow actors to join - Mifune, Shimura. Then I learned that this organization was crooked and really wanted to divide up the moon and sell it as real estate! I was so outraged that in ["The Mysterians"] when the earth scientists balk at giving the Mysterians some land on earth, I ad-libbed, 'But you're trying to divide up the moon and sell it!'"