First, you might want to buy them flowers, or maybe ask them out for coffee.
Next, turn on the charm, and see where the night leads you... Well, not as beautiful as my Japanese girlfriend, but it looks UNC.
Earlier coins come from the Showa (Hirohito) dynasty, which starts counting years in 1925, and later from the current Heisei (Akihito) dynasty, which starts counting in 1988. The coin in our photo comes from the 33rd year of the Showa dynasty, or 1925 33 = 1958.
Dating these coins can be a challenge for Westerners.
Dates before Showa 34 (1959) are worth about if in fully uncirculated condition.
Coins dated Showa 32 (1957) are scarce and can be worth in fully uncirculated.
That information, along with the coin's country, is the minimum you'd need to look up the coin in a guide, check if it's in your collection, or trade with another collector.
The Chinese Numerals Japanese is one such language which doesn't use Arabic numerals (0, 1, 2...).