It is headquartered in Sagamihara with subsidiaries in a number of countries, including Japan, the United States, Germany, Hong Kong, Malaysia, Taiwan, and China, with Ohara Corporation being the U.S. subsidiary of the Ohara Group.

Their web site lists areas of specialization, including: Among other things, Ohara is a major supplier of optical glass.

[4] On their website, Ohara describes a line of more than 130 environmentally safe glasses, produced without lead and arsenic.

The glass is available in a variety of forms, including strip, slab, cut blanks, and pressings.

Ohara includes in its catalog the famous E6 borosilicate (similar to Corning's Pyrex), ClearCeram-Z (a vitroceramic similar to Schott's Zerodur), and two well-known low dispersion glasses: FPL51 (the UD glass used by Canon) and FPL53 showing properties close to fluorite.