The Japan Railways Group, more commonly known as JR Group, consists of seven for-profit companies that took over most of the assets and operations of the government-owned Japanese National Railways in 1987. This tag is not for all train lines in Japan.

The JR Group lies at the heart of Japan's railway network, operating a large proportion of intercity rail service (including the Shinkansen high-speed rail lines) and commuter rail service.

It consists of 7 passenger companies, namely,