上野国

Etymology
From, in turn from +  + , where  was ateji for  in reference to an imperial agricultural area. Over time, the final no in Kami tsu Keno was reanalyzed as the possessive particle and was omitted from the name, producing Kamitsuke. The mi then nasalized and caused the tsu to become voiced, producing Kaũdzuke, and then the -au- underwent a regular vowel shift to become -ō-.

Proper noun

 * , corresponding to modern