There are as
many as 200 manual processes involved in making an optical frame.
Generally, productivity is low when one company is in charge of all the
processes. However, Masunaga Optical is the only company in Japan that has a
factory in charge of all processes from raw materials to production and finish
in an integrated way. The integrated production system improves the detail and
quality. For example, when Masunaga Optical develops a new model, the molds are
always built in-house. If there is a problem in the wear comfort that can be
felt only after completing one pair of glasses, it will be corrected in the
previous process' promptly.