The history of the Komura brand lenses is little-known. Information on the company and the lenses it produced is difficult to find online. But, many of the Komura lenses are very good, both in build quality and in optical results!
The company started out with making lenses for Large Format cameras. But in the 1950s they also started manufacturing rangefinder lenses for Leica thread mount cameras, and switched over to making lenses for Nikon rangefinders in the 1960s. Later, they also manufactured enlarging lenses, lenses for various medium format systems and also briefly produced lenses for various models of SLRs. Komura probably was the first brand to build a 1.4/85mm lens in Nikon F mount!