Is the raw material of Zeiss 1.6 spectacle lenses made by Japan’s Mitsui?

Yes.

This lens was developed by Japan's Mitsui Optical Research Institute and has applied for a patent. It is brighter and harder than ordinary resin materials.

Zeiss is a global pioneering technology group in the optical and optoelectronic industries. The Zeiss Group develops, produces and sells measurement technology, microscopes, medical technology, ophthalmic lenses, photography and cinema lenses, binoculars and semiconductor manufacturing equipment.