Help With Mark On Japanese Sometsuke Teapot

[kardinalisimo]

Any help with the mark?
Thanks

[peterp]

There is one character that I am not sure about. The middle one in the left column. If it is ??? as is likely, then it could be a name. In that case it most likely reads either Nakahira or Nakadaira (both readings are possible). The right column seems to tell us that it is Mikawachi (kiln) also called Hirado, in Kyushu.
Stan probably knows more about this.