National Route 409
国道409号
Route information
Length	119.3 km[1] (74.1 mi)
Existed	1 April 1982–present
Major junctions
West end	National Route 246 in Takatsu-ku, Kawasaki
Major intersections	National Route 1 National Route 15 Tokyo Bay Aqua-Line Ken-Ō Expressway National Route 16 National Route 410 National Route 297 National Route 128 National Route 126 National Route 296
East end	National Route 51 in Narita, Chiba
Location
Country	Japan
Highway system
National highways of Japan Expressways of Japan
← National Route 408 → National Route 410

National Route 409 is a national highway of Japan connecting Takatsu-ku, Kawasaki and Narita, Chiba in Japan, with a total length of 119.3 km (74.13 mi).