Zuman Kōki Kenkyūjo (ズマン光機研究所) was a Japanese company based in Tokyo, which made the Zuman Flex medium-format SLR and Zuman Super 16 subminiature camera from 1951. Its address was Meguro-ku Kakinokizaka (目黒区柿木坂) 381. It changed its name to Zuman Kōki Seisakusho (ズマン光機製作所) in 1952, at the same address.
- Asahi Camera (アサヒカメラ) editorial staff. Shōwa 10–40nen kōkoku ni miru kokusan kamera no rekishi (昭和10–40年広告にみる国産カメラの歴史, Japanese camera history as seen in advertisements, 1935–1965). Tokyo: Asahi Shinbunsha, 1994. ISBN 4-02-330312-7.