You correctly identified those, and I was able to use an online database of images to narrow it down more.
1 - Thailand 1 baht (1982-1985)
2 - Taiwan 1 yuan (1960-1980)
3 - Japan 10 yen 1959-1988 smooth edge
4 - Japan 10 yen 1951-1958 reeded edge
5 - Japan 50 yen 1955-1958
Since those went quick, I will include the last 10 coins in the next thread.
1 - Thailand 1 baht (1982-1985)
2 - Taiwan 1 yuan (1960-1980)
3 - Japan 10 yen 1959-1988 smooth edge
4 - Japan 10 yen 1951-1958 reeded edge
5 - Japan 50 yen 1955-1958
Since those went quick, I will include the last 10 coins in the next thread.






























