I got this charm below because of its beauty, but I had no idea what it meant. There used to be an excellent coin museum in Japan, Hosenka, which is unfortunately now closed. I sent them an email and they answered something like the following:
This charm probably comes from Ming era China（中国明朝）. The characters refer to something, probably wealth, increasing ten thousandfold each day. The reverse side picture is very complex. It pictures a scale. On the left side is the character for "intention" or "mind" in a circle. On the right side is an image which traditionally means heart. Perhaps the meaning is that for wealth to increase mind and heart must be in balance. The mind is helped by the empty square hole in the center which seems attached to the scale. What does it refer to? Below it the fingernail shaped object represents the moon. Its positioning is perhaps to balance the "sun" character on the top front. Perhaps this coin was used by a monk while teaching a parishoner. 这是小日本网上对右下角那枚的评论，他也认为是中国明朝的。
