Echigo Province was an old province in north-central Japan, on the shores of the Sea of Japan. It bordered on Uzen, Iwashiro, Kōzuke, Shinano, and Etchū Provinces. It corresponds today to Niigata Prefecture, minus the island of Sado.

Kōzuke Province was a province of Japan in the area of Japan that is today Gunma Prefecture. Kōzuke bordered by Echigo, Shinano, Musashi and Shimotsuke Provinces. Its abbreviated form name was Jōshū (上州). Under the Engishiki classification system, Kōzuke was ranked as one of the 13 "great countries" (大国) in terms of importance, and one of the 30 "far countries" (遠国) in terms of distance from the capital. The provincial capital is located in what is now the city of Maebashi; however, its exact location remains uncertain. The ichinomiya of the province is located in what is now the city of Tomioka.