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The Japan Railways Group, commonly known as the JR Group or simply JR, is a network of railway companies in Japan formed after the division and privatization of the government-owned Japanese National Railways (JNR) on April 1, 1987. The group comprises six regional passenger railway companies, one freight railway company, and two non-service entities. The JNR Settlement Corporation assumed much of the debt of the former JNR.
来源:维基百科