- ↑ Its address in 1943 was Tōkyō-to Edogawa-ku Hirai 2–877 (東京都江戸川区平井2–877). Source: "Kokusan shashinki no genjōchōsa" ("Inquiry into Japanese cameras").
- "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.
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