1952-12-04 - Jalan raya nasional rute 7 kelas pertama (dari Aomori sampai Niigata)
1965-04-01 - Jalan raya nasional rute 7 umum (dari Aomori sampai Niigata)
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.