Topcon was established based on the surveying instruments division of K.Hattori & Co., Ltd. (currently SEIKO HOLDINGS CORPORATION) in order to manufacture the optical instruments for Japanese Army, which are surveying instruments, binoculars and cameras.
Corporate Name: Tokyo Kogaku Kikai Kabushikikaisha (Tokyo Optical Co., Ltd.)
Head Office: 2, Ginza 4-chome, Kyobashi-ku, Tokyo
Factories: Toshima-ku and Takinogawa-ku, Tokyo
Paid-in Capital: 1million yen

Built head office and main factory at 180, Shimura-motohasunuma-cho, Itabashi-ku, Tokyo (current address) and moved head office functions there.

Released TOHKOH Transit, TOHKOH Y-Level
Marketing of Transit 5-inch, 4-inch, 3-and-half inch and 2inch, Y-Level 18-inch, 15-inch and 12-inch as civilian goods

Started manufacturing of the company's first camera, LORD.

With authorization by Tokyo governor to convert to production of civilian products, reopened factory closed upon end of World War II.
Focused mostly on the production of binocular, most of which were exported on the Unit States, paving the way for Japanese binoculars to dominate the U.S. market. Contributed to the reconstruction and development of Japan in the post-war era, moreover, through the production of surveying instruments.

Established Yamagata kikai kogyo kabushikikaisha. (currently Topcon Yamagata Co., Ltd.) in Yamagata-shi, Yamagata Prefecture.

Started Ophthalmic and Medical Instruments business.
Released the company's first lensmeter, Type I.

Topcon stock listed on the Tokyo and Osaka Stock Exchanges.

Released the Japan's first refractometer.

Released the Japan's first refractometer.

Adopted the name of "TOPCON" and "TOHKOH" for the company's cameras.

Released TOPCON R (the first prototype for the company's single-lens reflex camera)
Awarded Honorary Award at 1958 Brussels World's Fair and commended by the Minister of International Trade and Industry

Company representative stationed in New York.

Released Transit A
The first tower cover type. (became the design base thereafter)

Became an affiliate of Tokyo Shibaura Electric Co., Ltd. (currently TOSHIBA CORPORATION).

Released the company's first Auto Level AT.

Capital increase （Paid-in capital ¥150 million）

Released TOPCON RE SUPER
The world's first single-lens reflex camera with a TTL full-aperture metering system.

Released TOPCON uni
The world's first TTL lens shutter type 35mm single-lens reflex.

Released Retinal Camera Type I.

Installed the company optical equipment in the Antarctic expedition vessel, "Fuji".

Released Universal Measuring Microscope TUM-200.

Established the company's abbreviation name as Tokyo Kogaku, and trademark as TOPCON.

Commended by Minister of International Trade and Industry as company contributing to exports in FY1967.

Established Tokyo Kogaku Seiki Kabushikikaisha (currently TOPCON OPTONEXUS Co., Ltd.) in Fukushima Prefecture.