List of uknown far east coins

First coin(left): 2.40 grams, 24 mm
Second: 2.45 grams, 24.5mm
Third(right): 2.30 grams, 24 mm


Please note that the right coin has some dots on reverse
The middle one has a dot on the top right obverse.
Help me id please.

They are all Kan'ei cash from Japan.

I think the middle one is made of iron. Check if it's magnetic.

Also keep in mind there are tons upon tons of different varieties for this one coin since there were many mints. It will take a great effort to look up even one.

None of them are magnetic.
What can be different in this 3 coins?

It all goes down to the small details in the characters.

I have 8 more.  

Oh, I see.  

If  you want, you can send them to me in our swap, I'll have them identified for you, and then you'll know what they are.

That will be expensive, I have more from China I think.
I am mostly selling my doubles now.

Identifying more Chinese coins? This is going to be fun.  

I'm actually not sarcastic. I will buy off (rather trade) your Chinese coins, and I'm really looking forward to identifying all your coins. Although it would be easier to send me all your unidentified coins through PM, I think it might be helping others by having your coins identified on the forum. I'm sure it'd help me if I couldn't read Chinese.

So are these coins different?
I don't know what to do...I collect every coin if it has a minor change.
I start to think I'll keep them all ...
 

I can identify the Japanese ones if you send them to me.

Otherwise you'll probably hold onto them all.  

It's too much hassle to send them.
I'll keep them I think..
For the Japanese ones like this: is 1mm or 2mm more, important?
I'll post a few more from China in short time.

How about send them in the swap, and I'll send them back when I'm done?

It's not necessarily the length of certain characters, it's the stroke order and distinctive characteristics of each character. Because there are many varieties, it's much easier, unlike Chinese coins, if I had the coins in front of me instead of on a screen.