I'm 1956 208 Koban and 60 ichi-bu-kin were found during construction of the Ginza Komatsu Store. Who knows how many unknown caches of gold are buried in Japan. Here are some pictures from the exibit at the Tokyo National Museum.
Have pulled some old money there and old tabby clips, artillery primers, etc. I'll try to get some pictures up tonight. Have hit mostly the beaches around it. Today I am going to hit the woods a little.