Kōryōsha (向陵舎 or 向凌舎) was a Japanese company, which made the Baby Uirus 3×4cm camera from 1938, and its successor perhaps called "Baby New Yurisu" until c.1943. One source gives the name of the company as "Takinogawa Kōryōsha" (滝の川向陵舎). Takinogawa (written 滝野川) is a ward of Tokyo, and it is not entirely clear if the word was an actual part of the company name, or merely the place where it was located.
- Asahi Camera September 1938. "Atarashii kikai to zairyō" (新しい機械と材料, New equipment and machinery). P.547.
- "Kokusan shashinki no genjōchōsa" (国産写真機ノ現状調査, Inquiry into Japanese cameras), listing Japanese camera production as of April 1943. Reproduced in Supuringu kamera de ikou: Zen 69 kishu no shōkai to tsukaikata (スプリングカメラでいこう: 全69機種の紹介と使い方, Let's try spring cameras: Presentation and use of 69 machines). Tokyo: Shashinkogyo Syuppan-sha, 2004. ISBN 4-87956-072-3. Pp.180–7. Item 154.