Daiichi Kikō K.K. (第一機工株式会社) was a Japanese camera maker. It was based in Tokyo, Setagaya. During the war, it made the Primo 4.5×6 folders, distributed by Ōsawa Shōkai. Its logo is DK mixed together inside a circle.
- Primo I and II (4.5×6 folder)
- Its address in 1943 was Tōkyō-to Setagaya-ku Setagaya 1–781 (東京都世田ヶ谷区世田ヶ谷1–781). Source: "Kokusan shashinki no genjōchōsa" ("Inquiry into Japanese cameras"), listing the Japanese camera production as of April 1943. This source gives the company name "Daiichi Kikōgyō K.K." (第一機工業㈱) apparently by mistake.
- This logo is present on advertisements for the Primo, see the references in the corresponding page.
- "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.