Where was Dengeki Sentai Changeman filmed?
Television series
Dengeki Sentai Changeman (1985–) was filmed in Nagasaki Holland Village, 1 place named in its Japanese Wikipedia’s 概要 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.
Part of the Super Sentai Series
Places per Japanese Wikipedia's 概要 section
Japanese Wikipedia’s 概要 section names 1 place. Each links to the sentence that says so.