The line between Osumi and Nagao was shortened (0.1 km) because of the route change and on the section Matsuiyamate Station opened and the line between Matsuiyamate and Nagao became a double line.
大住-長尾間が経路変更で0.1km短縮、同区間に松井山手駅が開業、松井山手-長尾間複線化。