I found three prominent Hara surnames with a possible connection to the Hiei belt buckle reported to have been found with this chop. Chuichi Hara 1889-1964 Admiral Imperial Navy. Tameichi Hara Naval Commander Imperial Navy 1900-1980. But the one that stands out to me is Yoshimichi Hara who worked as a statesman and was a representative for Emperor Hirohito. I guess it would be hard to prove ownership of the chop but I can dream. Thanks.