Due to the G20 Osaka Summit from 27 June to 30 June, large-scale traffic restrictions will be in place around Osaka and the Kansai region.

Buses departing from and to the Kansai region may be suspended, running late or may not operate on a regular schedule on the day that the G20 Osaka Summit is held.
Traffic congestions will be expected on both highways and main roads in the Kansai region due to the traffic restrictions and security checks for the G20 Osaka Summit.
In addition, you cannot book tickets through Japan Bus Online website if the bus company decides to cancel their services during this 4-day period.

Please give yourself plenty of time for your journey and plan ahead before leaving.