Ehira was a Japanese camera maker before and after World War II, founded by Ehira Nobujirō (江平信次郎) and based in Yao, in the suburbs of Osaka. (Most Japanese camera companies were in Tokyo, with the notable exception of Molta, then Chiyoda Kōgaku, predecessor of Minolta, in Osaka.)
Before founding his own company, Ehira Nobujirō worked for Molta. There he drew plans for a metal focal plane shutter, patented by the firm in November 1932. It is said that he was also largely responsible of the innovative design of the Minolta Vest, a collapsible camera made of bakelite.
Ehira Nobujirō founded Ehira Kōki (江平光機) in 1936. The first product of the company was an accessory rangefinder, distributed by Yamamoto Shashinki-ten under its own Weha brand. The earlier Weha products, such as the Weha plate folders, were not made by Ehira.
The first camera made by Ehira was the Weha Chrome Six, notable for its coupled rangefinder device, inspired by the Super Ikonta and other Zeiss Ikon cameras. The earliest examples were perhaps made in Yamamoto's own workshop. Ehira also made the Weha Six 6×6 folder and the Auto Rapid Ehira and Kōki TTSH shutters mounted on the two camera models. The last examples of the Weha Chrome Six have no mention of Weha and are called Ehira Chrome Six.
The full name of the company in the early period is not certain; in 1943 it was called Ehira Kōgaku Kikai Kōjō (江平光学精機工場, meaning Ehira Optics and Precision Plant). The logo was Ehira K.S.K inside a doublet lens scheme.
The company survived the war: in January 1946, Ehira was one of the 17 founding members of the Kōgaku Seiki Kōgyō Kyōkai (光学精機工業協会, Optical and Precision Instruments Manufacturers' Association). It produced a small number of Weha Chrome Six and Ehira Chrome Six from the remaining stocks of parts.
In 1949, the company released the Ehira Six and Astoria Super Six coupled-rangefinder 6×6 folders, more directly copied from the Super Ikonta. At the time, its full name as appears in the advertisements was Ehira Kōki Seisakusho (江平光機製作所, meaning Ehira Optical Works).
The production of the 6×6 folders was stopped around 1956, and Ehira began to develop the Eltina 35mm camera, using a periscope system akin to that of the Periflex. The special focal-plane shutter of the Eltina caused much trouble, and the camera remained at an experimental level. Known examples have "Eltina Opt. Co. Ltd." engraved on the top housing, perhaps a new name for the Ehira company. Ehira also worked on a 35mm pentaprism SLR, perhaps called Eltinaflex, which remained unfinished.
Ehira Nobujirō retired around 1959 and died in 1961, at the age of 69.
- Weha Six I and II
- Weha Chrome Six I, II, III
- Weha Chrome Six III New and Ehira Chrome Six
- Enon Six
- Ehira Six IIIA and Astoria Super Six IIIB
- Weha accessory rangefinder, chrome, long base, available in metres or in feet (sold ¥15 in 1936)
- The address in 1943 was Ōsaka-fu Nakakawachi-gun Yao-chō Kozakai 148 (大阪府中河内郡八尾町小阪合148) and in 1949 it was Ōsaka-fu Yao-shi Kozakai 148 (大阪府八尾市小阪合一四八), the same address in the new administrative system. Source: "Kokusan shashinki no genjōchōsa" ("Inquiry into Japanese cameras") and advertisement dated November 1949 reproduced in Kokusan kamera no rekishi, p.121.
- Nakagawa, p.120. The patent number is S8-3457.
- Tanimura, p.32.
- Date: Tanimura, p.33.
- Weha rangefinder made by Ehira: Tanimura, p.33.
- McKeown, p.255, mistakenly attributes the Weha Light plate folder to Ehira.
- An October 1937 advertisement reproduced in Kokusan kamera no rekishi, p.59, mentions Yamamoto as the maker and distributor (製造発売元) of the Weha Chrome Six. Tanimura, p.33, however says that the Ehira plant was set up in 1936 and that the Ehira company produced the Weha Chrome Six from the start.
- Full name in 1943: "Kokusan shashinki no genjōchōsa" ("Inquiry into Japanese cameras").
- Lewis, p.60; Tanimura, p.36.
- Advertisement reproduced in Kokusan kamera no rekishi, p.121.
- Date: Tanimura, p.38 of Kurashikku Kamera Senka no.51.
- Tanimura, p.39 of Kurashikku Kamera Senka no.51.
- Retired around 1959: Tanimura, p.39 of Kurashikku Kamera Senka no.51. Ehira Nobujirō's grandson (User:Ehira_Grandson) confirms that he was born in 1891 and died on January 12, 1961, at the age of 69, from the testimony of Nobujirō's daughter. Tanimura's article wrongly says that Nobujirō was born in 1910 and died in 1962 at the age of 71.
- Metres or feet: Tanimura, p.33. Price: advertisement published in Sunday Mainichi (December 13, 1936), reproduced in the Gochamaze website (archived).
- 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.
- Awano Mikio (粟野幹男). "Weha Chrome Six" (ウエハークロームシックス). In Camera Collectors' News no.42 (December 1980, the cover wrongly has "no.41"). Nishinomiya: Camera Collectors News-sha.
- "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.
- Lewis, Gordon, ed. The History of the Japanese Camera. Rochester, N.Y.: George Eastman House, International Museum of Photography & Film, 1991. ISBN 0-935398-17-1 (paper), 0-935398-16-3 (hard).
- McKeown, James M. and Joan C. McKeown's Price Guide to Antique and Classic Cameras, 12th Edition, 2005-2006. USA, Centennial Photo Service, 2004. ISBN 0-931838-40-1 (hardcover). ISBN 0-931838-41-X (softcover). P.255.
- Nakagawa Chū (中川忠). "Metaru fōkaru purēn shattā no hensen (dai-ikkai)" (メタルフォーカルプレーンシャッターの変遷[第１回], Evolution of the metal focal-plane shutter [part 1]). Kamera Rebyū: Kurashikku Kamera Senka (カメラレビュー クラシックカメラ専科) / Camera Review: All about Historical Cameras no.51, June 1999. ISBN 4-257-13024-5. Kurashikku kamera supesharu (クラシックカメラスペシャル, issue about miscellaneous classic cameras). Pp.118–22.
- Tanimura Yoshihiko (谷村吉彦). "Ehira Nobujirō no kamera: Ehira Kōki, Uehā kara Eruchina made" (江平信次郎のカメラ・江平光機、ウエハーからエルチナまで, The cameras of Ehira Nobujirō, from the Weha to the Eltina). Kamera Rebyū: Kurashikku Kamera Senka (カメラレビュー クラシックカメラ専科) / Camera Review: All about Historical Cameras no.51, June 1999. ISBN 4-257-13024-5. Kurashikku kamera supesharu (クラシックカメラスペシャル, issue about miscellaneous classic cameras). Pp.32–9.