 Following the 11 March 2011 Tōhoku earthquake and tsunami, services on a portion of the Sanriku Railway were suspended.The portion from Rikuchū-Noda to Tanohata resumed operations on 1 April 2012.Minami-Rias Line, a portion of Yamada Line, and Kita-Rias Line constitute Rias Line on 23 March 2019.