Need help with Asian coin IDs

I'm back again with more Asian coins I need help identifying. Most importantly I need to figure out the country and denomination. Knowing the year would be a bonus. Just for fun, because I like to try to figure these out, I'll tell you my guesses.
The first I think is Korean.
The second I really don't know.
The third I don't know either.

 

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Here's the other two. The first I thought might be nationalist China because the flag reminds me of that. The second kind of reminds me of Chiang Kai Shek, so it might be from Taiwan.

 

the top 3 are almost certainly japanese, number 4 is i think the puppet state of manchuko and the last is china.

 

Thanks. Does anyone else have any more information?

 

t) Japan: 100 yen 1985 (Showa 60)
2) Japan: 1 sen 1922 (Taisho 11)
3) Japan: 5 yen 1949 (Showa 24)
4) Manchukuo: 5 li 1934 (Datong 3)
5) China: 10 fen 1936 (Republic 25) Portrait is Sun Yat-sen

Gary

 

Thanks, that helps a lot. Some are older than I would have expected.