Where was Gamera vs. Zigra filmed?

1971 film by Noriaki Yuasa

Gamera vs. Zigra (1971) was filmed in Keiō-Tamagawa Station and Kamogawa Sea World, 2 places named in its Japanese Wikipedia’s 制作 section, in Japan. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.

See them on the map → Wikipedia Source data

Places per Japanese Wikipedia's 制作 section

Japanese Wikipedia’s 制作 section names 2 places. Each links to the sentence that says so.