Why did some women wear white makeup from the neck only up to the chin?

I see it in movies set in the 1600's, if that helps...Why did some women wear white makeup from the neck only up to the chin?
cause i think its tradition for japan women. lol like in mulan


and i think like back then in the old movies they made the powder out of something, and so there werent different colors to suit each woman's skin color. lolWhy did some women wear white makeup from the neck only up to the chin?
they thought they looked hot
they were called geishas