| Passenger Railway Companies
|
 JR Hokkaido
|
 JR East
|
 JR Central
|
 JR West
|
 JR Shikoku
|
 JR Kyushu
|
| JR Bus Companies
|
JR Hokkaido Bus
|
JR Bus Tohoku
JR Bus Kanto [ja]
JR Bustech [ja]
|
JR Tokai Bus
|
West JR Bus [ja]
West Japan JR Bus Service [ja]
Chugoku JR Bus [ja]
Hikari Guru Rin Bus [ja]
|
JR Shikoku Bus [ja]
|
JR Kyushu Bus [ja]
|
| Smart cards
|
Kitaca
|
Suica
Mobile Suica
|
TOICA
EX-IC
|
ICOCA
|
ICOCA (SHIKOKU ICOCA)
|
SUGOCA
|
| Shinkansen lines
|
Hokkaido Shinkansen
|
Tōhoku Shinkansen
Jōetsu Shinkansen
Hokuriku Shinkansen
|
Tokaido Shinkansen
Chūō Shinkansen
|
San'yō Shinkansen
Hokuriku Shinkansen
|
Shikoku Shinkansen [ja](proposed)
|
Kyushu Shinkansen
Nishi Kyushu Shinkansen
|
| Railway museums
|
Hokkaido Railway Technology Museum [ja]
|
Railway Museum
Ome Railway Park
|
SCMaglev and Railway Park
|
Kyoto Railway Museum
Tsuyama Railroad Educational Museum
|
Shikoku Railway Cultural Center [ja]
|
Kyushu Railway History Museum
|
| Rolling stock manufacturers
|
-
|
Japan Transport Engineering Company
(J-TREC)
|
Nippon Sharyo (50.1%)
|
Kinki Sharyo (partner)
|
-
|
-
|
| International operations
|
-
|
West Midlands Trains (14.95%)
|
-
|
-
|
-
|
-
|
| Other organizations
|
 JR Freight
|
 Railway Technical Research Institute (RTRI)
|
 Railway Information Systems (JR Systems) [ja]
|
 Railway Telecommunication
↓
 SoftBank
|
 Japan Railway Construction, Transport and Technology Agency (JRTT)
|
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