K.K. Sanyō Shōkai (㈱三陽商会) was a Japanese sales company in the mid-1950s. It distributed the Renown Six Ia in 1954; its address at the time was Tōkyō-to, Minato-ku, Shiba Tamura-chō 2–2 (東京都港区芝田村町2–2).
- Advertisement dated May 1954 reproduced in Kokusan kamera no rekishi, p.212.
- 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.