Japan rail pass

JR:n junien lisäksi käy joissain busseissa ja lautoilla, mutta käsittääkseni vain JR Groupin alaisissa. Eli ei käy muiden junafirmojen junissa/busseissa paria poikkeusta lukuunottamatta.

Wikipediasta:
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The pass is valid for travel on Japan Railways Group (JR) transportation throughout the country in the class of service indicated on the pass on the following lines:

Train

Shinkansen, except Nozomi and Mizuho services[1]
Limited express (特急 Tokkyū)
Express (急行 Kyūkō)
Local (普通 Futsū), including Rapid (快速 Kaisoku) and Special Rapid (特別快速・新快速 Tokubetsu-Kaisoku/Shin-Kaisoku) services

The pass is also valid on the following non-JR lines:
Tokyo Monorail between Hamamatsuchō and Haneda Airport
Aoimori Railway for journeys starting and ending at Hachinohe and Aomori only, and for journeys from these stations to Noheji and the JR East Ōminato Line.

Bus

The pass is valid on the local routes of the following bus companies:
JR Hokkaido Bus Company
JR Bus Tohoku Company
JR Bus Kantō Company
JR Tōkai Bus Company
West JR Bus Company
Chūgoku JR Bus Company
JR Shikoku Bus Company
JR Kyushu Bus Company

Highway bus

The pass is valid on the following highway bus routes:
Sapporo – Otaru
Morioka – Hirosaki
Tokyo – Nagoya, Kyoto, Osaka, Tsukuba Center
Nagoya – Kyōto, Ōsaka
Ōsaka – Tsuyama, Kasai Flower Center

Effective with passes issued April 1, 2013, the Japan Rail Pass will no longer be valid on express bus routes.[2]

Ferry

The pass is also valid for travel on JR Ferry service on the following route:
Miyajima – Miyajimaguchi