A couple more coins I need help identifying,,,

I sure would appreciate any help that anyone has to offer...  I got as far as identifying the first two as Chinese 1 Cash but am not real confident as I am so new at this.  The second two are Japanese 5 Yen but I cannot determine if they are from the Showa era or the Heisei era as the weights and the dimensions are the same and I do not read Japanese.  Thanks again

You can use the calculators in the Numisdoc section without being able to read the languages, including Japanese. You regard the characters as pictographs, and then find matching pictographs. It is a challenge, though.   

The first Chinese is 1 Cash of Qianlong, 6th emperor of the Qing dynasty, 1735-1796.
There are several of them in the Numista database, you might need to compare more carefully yours to them (in particular the right character on the reverse) to determine the mint.
https://en.numista.com/catalogue/pieces7381.html
This one might be the one, though it's difficult to judge from your pictures.
By the way, when posting pictures always cut away most of the background around them. Thus your coins will look bigger and be easier for others to identify.    

The second Cash is from the time of emperor Daoguang (1821-1851)
Compare to this one
https://en.numista.com/catalogue/pieces12421.html

Below is the calculator evynr referred to
https://en.numista.com/numisdoc/calendar-japanese-34.html

The last two are 5 yen pieces (Japan). Finding the years is easy using the Numisdoc. Have a try.

Citação: AndreyThe first Chinese is 1 Cash of Qianlong, 6th emperor of the Qing dynasty, 1735-1796.

Not technically correct, the first two were Khans, or the first was a Khan and the second changed to an Emperor. Just a bit of nitpicking, impressive still that you knew he can be considered the sixth.

I don't read Chinese and Far East is not my area of particular numismatic interest or expertise. But since a couple of hundred cast cash coins passed through my hands in the last 10 years and from this experience in most cases I can identify the ruler, at least within the last 2-3 centuries of the Empire, just wanted to help with identification    Identifying provincial mints though is still beyond me.