Info on OKAMOTO GUN CO. TOKYO

I have a side by side 12g with the following stamped into the rib between the barrels on the top of the gun MANUFACTURED BY OKAMOTO GUN CO. TOKYO the only other markings on the gun are the numbers 5733 stamped on the forarm , receiver , and barrels, and the words choke 12 stamped on the underside of the barrel. the gun also has a lot of scroll work on the receiver. i have had the gun for 20+ years and it was given the gun by my father he had it forever. I would just like to know more about the gun & maker. thanks for the help jason