R&D, Manufacturing and Global Sales

R&D and Manufacturing

Optical glass technology and optical design expertise represent our body of work, and our R&D is our heartbeat.

SUMITA’s R&D starts from ideas such as: “It’d be interesting if this could be done with optical glass materials”, “How can we develop our technology one ahead of what we have now to meet the needs of society?”, and “How can we create products that are better for human health, living creatures, the environment, and climate change?” Other than profit or efficiency, we start from a commitment to new technology. In this way, revolutionary products have been produced from research accumulated in our free corporate culture. Many products, world-renowned for their striking excellence, have appeared. And our success would not be possible without our optical designers and product developers, who translate sparks and inventions into creative solutions.

Urawa Factory (R&D and Manufacturing)

4-7-25 Harigaya, Urawa-ku, Saitama-City, Saitama 330-8565 Japan

Tajima Tabehara Factory (R&D and Manufacturing)

174-1 Tabehara, Tajima, Minamiaizu-machi, Minamiaizu-Gun, Fukushima 967-0004 Japan

Facility for Aspheric Lens Manufacturing

Established in 2021
• 1,900 sq. m
• 3-storey building
• Class 1000 cleanroom
• Vibration isolation floor
• Precision air conditioners

Volume production of micro and high precision optical components used in endoscopes and optical communications.

Factory for Precision Molding Lenses

Established in 2001

A facility exclusively for manufacturing precision molding lenses with our original technology. SUMITA enables integrated manufacturing of precision molding lenses in this factory, including various manufacturing processes such as development of glass materials, processing equipment and molding die.

Factory for Medical Device Manufacturing

Established in 2015

We manufacture and assemble endoscope parts in this factory. Most of the process can be done in clean rooms, which contributes to manufacturing the latest medical devices.

Factory for High Transmittance Optical Fibers

Established in 1999

This factory provides a combination of full coverage of producing fiber optics from melting glass to drawing fiber all in clean rooms. Next generation optical fibers are developing and manufacturing here.

Factory for Fiber Optics

Established in 1989

At this factory, we draw optical fibers and assemble fiber optics products. In 1996, we expanded a factory which is exclusively for manufacturing leached image bundles, a factory equipped with class 1000 clean rooms. SUMITA continues to supply high quality leached image bundles from here.

Factory for Optical Glass

Established in 1996

At this factory, SUMITA introduced the latest melting facility for shortening the delivery time and reducing cost, while improving efficiency and quality.

Tajima Nagano Factory (Manufacturing)

182 Kunugibayashi, Nagano, Minamiaizu-machi, Minamiaizu-Gun, Fukushima 967-0001 Japan

Sumita Photonics (Manufacturing)

Nango/ Tadami Factory

With the latest equipment, this factory processes high-tech key devices and assembles optical fibers, light sensors and light guides.

Global Sales


Saitama, Japan

4-7-25 Harigaya, Urawa-ku, Saitama-City, Saitama 330-8565 Japan


Nuremberg, Germany

Andernacher Str. 23, 90411 Nuremberg, Germany
+49-(0)911 3766 83 60
+49-(0)911 3766 83 61


Dongguan, China

Science road 195#, Dongkeng town, Dongguan, Guangdong, China.