Koshimitsu (越光) was a Japanese company in the early 1940s. It is listed in the April 1943 government inquiry on Japanese camera production as the distributor of the "Baby New Yurisu" 3×4cm camera, and the maker of its "Yurisu" (ユリス) 55/6.3 three-element lens and "New Yurisu" (ニューユリス) shutter (25–150, B).
- Name inferred from the katakana ベビーニューユリス; the actual Roman spelling is unknown.
- "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, lens item K1, shutter item 18-V-10.