Japanese Teabowls in Black and white

Hi there
Does anyone recognized these bowls. They are signed to the base but so hard to figure.
Many thanks for loooking

 

I can only guess but i have a question,

A black glazed/Matt? 'yakimono chawan' ( japanese tea cup)
Is the black part over glaze or under glaze? Also is the black part glaze (shiny) or Matt?

In english the techbnique is called a non glaze ceramic slip or engobe.
In korean it is a Hakeme Slip. In Japanese it is Nagashigake: Slip trailing.
Tamba pottery has a similar style but i am not sure it is the same backmark.Also Ontoni ware is similar is style and they make Chawan.

Here is a very good index of pictured Japanese Pottery backmarks, it might be in here.

https://chano-yu.com/famous-japanese-potters-and-marks/

Also here are many Japanese pottery ceramic styles

https://japanobjects.com/features/japanese-pottery

 

Good info Francisco. I am bookmarking those.

 

Hi Francisco
Here are some more pics of the bowl which i hope will clear up the layered technique...