The top right is a Japanese 100 yen. The lower right is South Korea 100 won. Not sure on the top left (someone probably knows), and the bottom left is a Japanese 10 yen.
If you take the country and denomination I stated above and search in numista.com you can find the exact types. The three I listed are all modern.
Top left is a Chinese cash coin. You need to rotate your picture 90 degrees counter clockwise to have the correct orientation though. Check these out to help you identify it: http://www.sportstune.com/chinese/coins/idpage.html http://www.calgarycoin.com/reference/china/china8.htm#chien lung
I found that the coin is: Dynasty: Ch'ing (1644 - 1911 a.d.) Emperor: Kao Tsung (1736-1795 a.d.) Reign Title: Ch'ien Lung(1736-1795 a.d.) But I can't match the mint mark anywhere... http://www.sportstune.com/chinese/coins/chienlung.html
Looks like either a variation on Beijing or Yunnan province. Someone painted over the inside of your coin with gold paint too, FYI
The Japanese 10 yen is Shōwa year 58 (1983). And the 100 yen you can see the date year 16~ which is Heisei year 16 (2004). We are currently in year 31 of the Heisei Emperor’s reign (Emperor Akihito)~although he is abdicating soon due to health reasons. Crown Prince Naruhito will become the new Emperor May 1st. The Chinese coin looks to be a copy, probably a souvenir token.
I think it may be a souvenir token like Bayern suggested but very interesting to find out what it is. Thank you!
