classic motorcycle forum

A friend gave to me a seat from his deceased father's estate and I need help identifying its application. I think it's from 70's Japanese bike but not sure. The seat does not have side hinges but rather mounts with a front tongue and a bracket on each side. The grab bar is mounted to the seat and it also has three mounting studs for a seat extension or duck tail.  The trim along the bottom edge of the seat is either dark brown or burgundy with a gold stripe. Thanks in advance. Jim P.