I was also in this movie, it was the best experience I've ever had growing up in Japan. I went to school in Yokosuka and later moved to Atsugi attending Zama, but I'm a Yo-Hi Devil forever!!! Any who, I was not a main character I was playing two different characters (as an extra), we spent all our free times just hanging out waiting for our turn to shoot our scene...got treated to McDonalds a lot :-)
This movie is your typical Japanese "Godzilla" like movie and the special effects back then were cool...notice I said back then! If you were to watch this movie now, you'd think differently, so if ever seeing, please keep in mind that this movie was made back in 1987. I would love to hear from the other two that has posted a comment on this.