>>109857658If you're talking about Mother of Mountains, that was actually in Geishu territory since Noriko was running a secret operation just outside of Sanada's own domain. That was in the southern part of the Geishu province so it's near either Iwami or Su? but we don't know which realm is Sanada's.
>>109860158From what I can find, the blank region on the map is actually several different regions that were referred to by several different names.
One of them, which was basically just the provinces of Mutsu and Dewa, was called T?hoku, Mutsu (which could be confusing), ?u, or was subdivided into Dewa and Mutsu (or Michinoku or ?sh?) regions. Mutsu as a province is as large as some of those other regions already and Dewa not far off.
The area from Tajima/Harima to Echigo/K?zuke is part of Ch?bu, which also includes Tokai, Kant?, and Kinai, which are labelled.
The coastal area along the Sea of Japan between Tajima and Echigo was called Hokuriku. The central region of Hida, Shinano, and Mino doesn't seem to have a specific name from back then, at least, that I can find without having to really go digging for it.
