I really have no idea which company makes what. I've read suggestions that Kamakura makes or has made models for Swift, Bushnell, Nikon, Pentax, Fujinon, Kowa, Leupold, Eagle Optics, Opticron, Vortex, Vixen, and Zeiss amongst others. Light Optical works, Leupold, Vortex, some Branded telescopes and I'm sure many more.
If you include Kamakura's subsidiary in China and LOW's in the Philippines and probably elsewhere I expect it would include a lot of other familiar names and models.
David