Kan'eitsūhō (Japan) further identification

I found out that this is a 1 Mon Kan'eitsūhō New Type 

But I can't find anything about the type with a dot below the hole
Has somebody more information about this one?

Try this:

N#283917

I think it may be a casting defect 

Thank you for the answer, bur there are some differences with N#283917, that looks like an old type, the bottom character is Nisuiei instead of Ei and has a square head Tsu instead of a closed head.

I would also say that it is from an unfortunately positioned bubble from a badly compacted mould.

Hello 

Agree with a mold error

https://en.numista.com/catalogue/pieces121454.html#

For jūmantsubo 

Thank You All,

I think that there is only one plausible explanation for the “dot”, as mentioned it is caused by a production error.

That leaves me with the New Type Blank Reverse.
I dont think the Jūmantsubo  description fits. For the 1700 version it should have a 永 with right hand and I think the little hook on the right arm is too small to call it a hand. For the 1736 version which is the Tiger Tail type, I think the tail is too short for that.
It could the Kyoto-Shichijo type, but I think the coin is not reddish enough for that.
Could this be the Yamashiro-Yokoōji type?

I'm also for Jūmantsubo-sen. please provide weight and diameter 

Weight 2,80 gram and diameter about 24.2 mm on average

Thickness 1,0 mm

Could be 不旧手十万坪銭狭目寛 FUKYŪDE JŪMANTSUBO-SEN KYŌ-ME-KAN

https://kosenmaru.sub.jp/kannei9.html

Scroll to the bottom. Which of the six do you think? 😆

I should have to start studying FUKYŪDE…