Also written as: Etchu

An ancient province of Japan bordering on Echigo, Shinano, Hida, Kaga, and Noto, which is now Toyama Prefecture. The territory was contested by the clans of neighboring provinces during the Sengoku Era, the Uesugi Clan among them. The Oda Clan took the province from Uesugi Kagekatsu, and Sassa Narimasa governed the area for a number of years, followed by the Akimoto, Matsudaira, and Hosokawa Clans.