It constructed the Taro to Fudai section, and transferred the entire line to Sanriku on the day it opened in 1984.

It constructed the section to Kamaishi and transferred the entire line to Sanriku on the day it opened in 1984.

[3] The two sections of the Sanriku Railway were for a long time separated by a destroyed segment of the Yamada Line.

On 23 March 2019, the Yamada Line section from Miyako to Kamaishi was reopened and transferred to Sanriku Railway.

The result is a resumption of continuous rail service between Kuji and Sakari Station where it links with the Ōfunato Line.