National Route 408
国道408号
Route information
Length	116.9 km[1] (72.6 mi)
Existed	1 April 1982–present
Major junctions
North end	National Route 4 in Takanezawa, Tochigi
South end	National Route 51 / National Route 295 in Narita, Chiba
Location
Country	Japan
Highway system
National highways of Japan Expressways of Japan
← National Route 407 → National Route 409

National Route 408 is a national highway of Japan connecting the cities of Narita, Chiba and Takanezawa, Tochigi, with a total length of 116.9 km (72.64 mi).