Sites that index production dates, performer credits, and thematic tags.

The company behind HEYZO-1923, Kōdansha Ltd., was founded in 1909 in Tokyo, Japan. Initially, the company focused on publishing and distributing books, but it soon expanded its operations to include the production of photographic equipment. In the 1920s, Kōdansha began to develop its own line of cameras, which would eventually lead to the creation of HEYZO-1923.

Information about the lead actress or studio (HEYZO) often includes historical data on their releases.

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