Welcome to the forum frank. If you have a gold ¥10, dated from Meiji 4-43 (1871-1910), it's worth at least BV of about $105-110, and if it is an 1877 or 1880 BU, the Japanese Numismatic Dealers Association catalog values it at ¥20-million (about $196,000). Clark Smith currently has this Meiji 4 (1871) available for only $6,200: On the other hand, if you have a bronze ¥10, dated from Showa 34-Heisei 16 (1959-2005), it's worth at least 15 for a dollar, but not more than $35-40, all depending on date and condition. For an excellent tutorial on dating Japanese coins click here.
My daughter has a 10 yen . 2012 is located at the top over ten and symbols are below the 10. How much is that worth?
Greets. A bronze 10 yen that has no reeded edge is worth around 9c. I spend them all day here in Tokyo.
Here are the numerals from one to ten. 昭和 - Showa (emperor Hirohito 1926-1989) 平成 - Heisei (emperor Akihito 1989- 2019 (he plans to abdicate next year))
If it is the emperor's first year, they use this symbol - 元. It means "first", as opposed to year two, three, etc.
Post a picture and we can tell you the date. Even a vaguely reasonable phone shot will work. You can upload it by using the 'upload a file' button on the bottom right of the dialog box when typing up your post. This page is one of several on the internet that shows you how to date a Japanese coin (but don't google Japanese dating or you will get a whole different type of response). http://www.starcityhomer.com/reading-japanese-coins.html
Reeded edge ¥10 are worth about 20-25 cents unless they are red or yellow, lustrous and free of any contact marks. Anything less than very high XF is only worth the bulk price of about double face value.
Showa 47 + 1925 = 1972 I'm not aware of ones that recent having numismatic value. I can still find the reeded ones from the 50s in the 10 for a dollar bin at coin shops. I can't speak as to if it's in good enough condition to carry a premium.
These 10 Yen coins still circulate in Japan and in its current condition it would be worth only face value, which isn't very much, I'm sorry to say. The JNDA lists its mintage as 634,950,000. Even in absolutely mint condition it would only bring about $6.00. Face value: 10 Yen = 0.093 US. The date, Showa Year 47, shows under the large "10": 昭和四十七年