Does any one have any information on a ultra hi from Miroku 50 cal black powder?

The Miroku Ultra Hi is a type of black powder firearm, specifically designed for .50 caliber ammunition. Miroku, a Japanese manufacturer, is known for producing high-quality firearms, and their black powder rifles often feature traditional designs and craftsmanship. For specific information, including specifications or historical context, it might be useful to consult specialized firearm forums or collectors' groups. Additionally, checking with dealers who specialize in black powder firearms could provide more detailed insights.