The Nankai Electric Railway Co. has just announced that they expect to resume the train service between Hashimoto station and Koyasan station as of March 31, 2018.
From Koyasan station to the precincts of Kongobuji Temple (=Koyasan), please take a local Nankai bus bound for Okunoin or Daimon.
Therefore, the current bus service between Hashimoto station and Daimon Minami Chushajo will be provided until March 30, 2018.