日本にほん国こく有ゆう鉄てつ道どうにほんこくゆうてつどうMeanings1nounJapanese National Railwayshistorical termHistorical term for the state-owned railway company that operated from 1949 until its privatization in 1987, when it was split into the JR Group.日本にほん国こく有ゆう鉄てつ道どうは1987年ねんに分ぶん割かつ民
