Japan National Route 423

National Route 423
National Route 423
国道423号
新御堂筋 (Shinmidō-suji)
	National Route 423 highlighted in red
Route information
Length	50.6 km (31.4 mi)
Existed	1982–present
Major junctions
South end	National Route 25 in Kita-ku, Osaka
	National Route 1; National Route 479; National Route 171; Shin-Meishin Expressway; National Route 372 / Kyoto Jūkan Expressway;
North end	National Route 9 in Kameoka, Kyoto
Location
Country	Japan
Highway system
	National highways of Japan; Expressways of Japan;

National Route 423 (国道423号, Kokudō Yonhyaku ni-jusangō) is a national highway of Japan connecting Kita-ku, Osaka and Kameoka, Kyoto in the Kansai region of Japan.