When I checked twitter, I found my two followers were involved in the train delay. The cause of train delay was that a train was crashed into a vehicle near Murohguchi-ohno. Limited Express train on which either of my followers rode was suspended its operation at Haibara. And, he waited for an alternative bus service to go to Nabari.
After a while, he took the bus to Nabari. From Nabari, he took train for Nagoya. Total time required for this trip is more than 5 hours.
The accident seems to be a big accident since train derailment which happened at Higashi-Aoyama two years ago