Tanaka Shōkai was a Japanese distributor in the first half of the 1950s.
It advertised the Alpenflex in the February 1953 issue of Nihon Camera, and the Alpenflex, Konica II, Fujica Six IIC and Toho Six I in the November 1953 issue of the same magazine. In the advertisements, two addresses were provided, both within the Tokyo area: one in Shibuya (渋谷区上通り3–18) and the other in Ogikubo (杉並区上荻窪2–14).
- 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.
- Nihon Camera (日本カメラ). Advertisement by Tanaka Shōkai in February 1953, p.104. The advertisement is for an unspecified model of Alpenflex (apparently the I or IS and probably the former as a self-timer is not mentioned).