Hi. Saw your message about Japanese treasure. I live and metal detect in S. Korea, but due to the trading done between China, Japan, and Korea, and due to Japanese presence/occupation of Korea from 1910 to 1945, I have found a huge amount of Japanese coins. I am not an expert, but do have about 30 + years experience of dealing with Japanese coins, identifying them, and I do have a Japanese coin book and am able to navigate through it (it is written basically in Japanese, with many Chinese characters) fairly well. If you choose, let me know what you have found, and send a picture or two. I will definately get back with you. And, if I can't answer your questions, then I do have some coin dealers in S. Korea who are experts in Japanese coinage, and I will contact them.