The story
The Ministry of Railways of Japan started its first bus operation in Aichi Prefecture in 1930 and gradually expanded bus routes. The Japanese National Railways (JNR), public corporation established in 1949, succeeded the bus operations, then called Kokutetsu Bus or JNR Bus. In 1987, JNR was divided into regional railway companies together with its bus operations. JR companies later separated their bus operations to subsidiaries in 1988 (JR East, JR Central, JR West), 2000 (JR Hokkaido), 2001 (JR Kyushu) and 2004 (JR Shikoku).
From Wikipedia’s article on JR Bus, shared under CC BY-SA 4.0.3
