Used NengoConvert for Windows?
Developer’s Description
NengoConvert is a tool to allow quick translation of the Japanese calendar system (known as Nengo) into the Western one and back. by simply picking the year or era in the drop down boxes one can get the conversion data for the opposing calendar system. This is one of the few Nengo conversion tools which goes past the Meiji era all the way to 645 AD (the first Nengo know as the Taika Era).
Used NengoConvert for Windows?