Top row:
Japan 5 yen. Modern and worth 5-10 cents.
Not sure on the other two; I'm bad with Arabic coins.
Middle row:
Japan 50 yen. Nice, older style. Would have to look up exact date--maybe 50s or 60s? Worth a couple bucks
Japan 10 yen. Super common and worth about 10 cents.
Thailand, not sure of the date or denomination. These are rarely worth much.
Bottom row:
Taiwan
China, 1 cash of Qianlong emperor using reign title Shan Lung. Made from about 1770-1796. Hands down the most common coin of the 18th century, worth about 50 cents.
Korea, maybe 10 won?