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1953-05-18 - Second Class National Highway 147 (from Ōmachi to Matsumoto)
1965-04-01 - General National Highway 147
References
^"一般国道の路線別、都道府県別道路現況" [Road statistics by General National Highway route and prefecture] (PDF) (in Japanese). Ministry of Land, Infrastructure, Transport and Tourism. Retrieved 19 February 2020.