Japan National Route 400

National Route 400 is a national highway of

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

connecting

Mito, Ibaraki is the capital city of Ibaraki Prefecture, in the northern Kantō region of Japan. , the city had an estimated population of 269,330 in 123,282 households and a population density of 1239 persons per km2. The percentage of the population aged o ...

and

Nishiaizu, Fukushima is a town located in Fukushima Prefecture, Japan. , the town had an estimated population of 6,090 in 2598 households, and a population density of 20 persons per km². Approximately 66% of the population is over the age of 65.National highways in Japan Roads in Fukushima Prefecture Roads in Ibaraki Prefecture Roads in Tochigi Prefecture {{Japan-road-stub