Optas Optical Instruments.
- Suppliers of optical instruments such as magnifiers and microscopes for technical applications in industries and laboratories.
- http://www.optas-jp.com/

Topcon Corporation
- Maker of optical devices, ophthalmic, medical, surveying, and industrial instruments. Based in Itabashi-ku, Tokyo.
- http://www.topcon.co.jp/

Hoya Corporation
- Manufacturer of optical glass and active in electro-optics, photonics, vision care, healthcare and crystal products.
- http://www.hoya.co.jp/