4 Desember 1952 - Jalan raya nasional rute 4 kelas pertama (dari Tokyo sampai Aomori)
1 April 1965 - Jalan raya nasional rute 3 umum (dari Tokyo sampai Aomori)
Referensi
^"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) (dalam bahasa Jepang). Ministry of Land, Infrastructure, Transport and Tourism. Diakses tanggal 19 February 2020.