Million Shōkai (ミリオン商会) was a Japanese company, which distributed the Semi Frank and Frank Six at the beginning of the 1950s. Its address was Chūō-ku Ginza Higashi (中央区銀座東) 3–5 in Tokyo. It is not known if the Million Proud camera is related to this company.
- 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.