is a national highway connecting Tokyo and Yokohama in Japan. It is commonly referred to as .
Route data
Length: 29.2 km (18.1 mi) Origin: Nihonbashi, Chūō, Tokyo (originates at junction with Route 1, Route 4, Route 6, Route 14, Route 17 and Route 20) Terminus: Yokohama (ends at Junction with Route 1) Major cities: Kawasaki
History
4 December 1952 - First Class National Highway 15 (from Tokyo to Yokohama) 1 April 1965 - General National Highway 15 (from Tokyo to Yokohama)
Municipalities passed through
Tokyo
Chūō - Minato - Shinagawa - Ōta
Kanagawa Prefecture
Kawasaki (Kawasaki-ku, Kanagawa) - Yokohama (Tsurumi - Kanagawa)