I believe most of these are coins are from japan. The only writing I understand besides the number value, is '42' and '43' on the smaller coins with the flowers(any idea where these are from?). All are in great condition.
that's some pretty standard Japanese pocket change. The yellow one with the hole is 5 yen, but the others all have their value in English, so you shouldn't need much help with that. If you really want, we can see what we can do to translate the years on them for you.
Japanese coins They look to be all Japanese. I just got done researching some of my own that are almost identical to those in the pic.
Top row: 100 Yen, Showa Era, exact date (S43-63/1965-85) too out of focus to read, Cu-Ni, Y#82; 50 Yen, Showa 42 (1967), Cu-Ni, Y#81; 10 Yen, Showa 51 (1976), Bronze, Y#73a. Middle row: 1 Yen, Showa 41 (1966), Aluminum, Y#74; same, Showa 50 (1975); 5 Yen, Showa 52 (1977), BrassY#72a. The bottom Yen pictured with the undated side in both pictures could be Y#74, Showa 30-64 (1955-1989); Y#95.1, Heisei Gan (First - 1989), or Y#95.2 (1990-present).
I was in China a year ago and received one of the Japanese 5 yen coins in change. I (for obvious reasons) thought it was Chinese, but I found it in a reference book. I am surprised that China includes Japanese coins in their circulating currency.
Perhaps this Japanese 100 yen 1967 (昭和42年) http://en.ucoin.net/users/coin/japan_100_yen_1967/?ucid=1207 or Japanese 100 yen 1968 (昭和43年) http://en.ucoin.net/users/coin/japan_100_yen_1968/?ucid=1206
