Nagato, Yamaguchi. It has a total length of 53.4 kilometers (33.2 mi). "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]...

Ōtoyo, Kōchi in Japan. It has a total length of 166.9 km (103.79 mi). "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]...

and Hagi, Yamaguchi in Japan, with a total length of 62.4 km (38.8 mi). "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]...