Your Japan Rail Pass gives you access to the JR local bus lines (JR Hokkaido Bus, JR Bus Tohoku, JR Bus Kanto, JR Tokai Bus, JR Shikoku, West Japan JR Bus, Chugoku JR Bus, JR Kyushu Bus). Pass validity for particular routes is subject to change.
Please note that the Japan Rail Pass is not valid for travel on express bus routes operated by JR bus companies.
Here is a list of the most useful ones for travelers in Japan :
Samani-Erimo Misaki (Cape Erimo)
Aomori station - Aomori airport
Hachinohe/Aomori- Towada Lake
Naganohara Kusatsuguchi-Kusatsu Onsen-Shirane Kazan
The Japan Rail Pass is also valid for the JR Miyajima Ferry (Please note that the JR Hakata-Pusan ferry to Korea is not included).