Gamera vs. Zigra Theme Song

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Does anyone know of the song from Gamera vs. Zigra that plays during the opening titles, and also during the scene when the woman is chasing two kids around Sea World? I can't hear the music clearly because I only have the MST3K version of the film, and so Joel and the bots are talking over the song, but I just love that song. If anyone knows where I can find a clear version to listen to, that'd be great.