The area encompasses the old provinces of Shinano and Echigo. Though the name is a combination of those two provinces, the region also contains Sado Island from Sado Province. It is located in the modern-day prefectures of Nagano and Niigata.
The name Shin-Etsu is used in the name of related multinational chemical companies.
- Hashimoto, Mitsuo. (1990). Geology of Japan, p. 94., p. 94, at Google Books
- Shin-Etsu Chemical, company's history; excerpt, "Shin-Etsu Chemical Co., Ltd. began with the coming together of Nagano Prefecture's (Shinano-area) water and Niigata Prefecture's (Echigo-area) limestone.... The company's 'Shin' comes from Shinano and 'Etsu' is taken from Echigo."
- Japan Railways, Shinetsu line; retrieved 2011-07-18
- Molony, Barbara. (1990). Technology and Investment: The Prewar Japanese Chemical Industry, p. 137., p. 137, at Google Books