Etchū Province was a province of Japan in the area that is today Toyama Prefecture in the Hokuriku region of Japan. Etchū bordered on Noto and Kaga Provinces to the west, Shinano and Hida Provinces to the south, Echigo Province to the east and the Sea of Japan to the north. Its abbreviated form name was Esshū (越州).

Toyama Prefecture is a prefecture of Japan located in the Chūbu region of Honshu. Toyama Prefecture has a population of 1,044,588 and has a geographic area of 4,247.61 km2. Toyama Prefecture borders Ishikawa Prefecture to the west, Gifu Prefecture to the south, Nagano Prefecture to the east, and Niigata Prefecture to the northeast.