The Sanriku Railway (三陸鉄道, Sanriku Tetsudō) is a railway company in Iwate Prefecture in northern Japan. The company and its lines are also known as Santetsu (三鉄). The company was founded in 1981, as the first "third-sector" (half public, half private) railway line in the country, excluding special cases such as freight railways in seaports. Its lines are former Japanese National Railways (JNR) lines, that were going to be closed. Santetsu acquired these lines in 1984. The company also operates a travel agency and other businesses.