Japan National Route 424

The northern end of National Route 424's concurrency with National Route 42 in Minabe.

National Route 424 is a national highway that does not leave Wakayama Prefecture. The highway connects the cities of Tanabe and Kinokawa, running south–north across the prefecture. The highway almost entirely runs through the prefecture's inland mountainous area, paralleling the coastal routing of National Route 42 and the Hanwa Expressway; however, the southernmost section of the highway between Minabe and Tanabe runs along the prefecture's west coast.[2] The highway has a total length of 113.0 kilometers (70.2 mi), excluding its auxiliary routes.[3]

On 1 April 1982, National Route 424 was established by the Cabinet of Japan between the city of Tanabe and the former town of Uchita which has since been merged into the city of Kinokawa.[4] In 1996 a project began to widen and straighten a winding one-lane section of the road along the Shuri River in Aridagawa. The realignment project was completed on 11 July 2012 with a total cost of 8.9 billion yen.[2] Another project began in 2010 in Minabe to straighten and shorten the highway. The project was significantly delayed by landslides caused by Tropical Storm Talas on 5 September 2011.[5] On 2 October 2017, the project was completed, shortening the total length of the highway by about a kilometer and a half.[5]

The route lies entirely within Wakayama Prefecture.

Location	km[3]	mi	Destinations	Notes
Tanabe	0.0	0.0	Wakayama Prefecture Route 31 – Shingu, Shirahama, central Tanabe	Southern terminus
	1.0	0.62	Wakayama Prefecture Route 207 – Nagano
	1.2	0.75	Wakayama Prefecture Route 29 – Ryūjin
	2.0	1.2	National Route 42 east – to Kisei Expressway east, Hanwa Expressway north Wakayama Prefecture Route 208 – Central Tanabe	Southern end of National Route 42 concurrency
	3.6	2.2	Wakayama Prefecture Route 210 east – Central Tanabe
	5.4	3.4	Wakayama Prefecture Route 199 north – to Kisei Expressway east, Hanwa Expressway north, Wakayama, Shirahama
Minabe	9.9	6.2	Wakayama Prefecture Route 200 north
	10.2	6.3	Wakayama Prefecture Route 201 east – Minabe Station
	10.7	6.6	National Route 42 west – Wakayama, Gobō	Northern end of National Route 42 concurrency
	12.3	7.6	Hanwa Expressway – Shirahama, Osaka	Minabe Interchange (E42 exit 33)
	15.5	9.6	Wakayama Prefecture Route 30 west – Inami	Southern end of Wakayama Prefecture Route 30 concurrency
	16.6	10.3	Wakayama Prefecture Route 30 east – Haya, Akitsugawa	Northern end of Wakayama Prefecture Route 30 concurrency
	20.5	12.7	Wakayama Prefecture Route 197 west – Furui
	26.3	16.3	Wakayama Prefecture Route 199 south – Tanabe
Tanabe	35.0	21.7	National Route 425 east – Shingū, Nakahechi	Southern end of National Route 425 concurrency
	40.7	25.3	National Route 425 west / Wakayama Prefecture Route 29 south – Inami	Northern end of National Route 425 concurrency, southern end of Wakayama Prefecture Route 29 concurrency
	44.6	27.7	Wakayama Prefecture Route 29 north	Northern end of Wakayama Prefecture Route 29 concurrency
Hidakagawa	59.1	36.7	Wakayama Prefecture Route 26 west – to National Route 42, Gobō Wakayama Prefecture Route 194 east – Kamiubuyugawa
Aridagawa	75.1	46.7	Wakayama Prefecture Route 179 west
	77.1	47.9	Old National Route 424 north – Kainan Wakayama Prefecture Route 22 west – to Hanwa Expressway, National Route 42, Arida, Yuasa
	77.7	48.3	National Route 480 – Arida, Kōya, Shimizu
	78.9	49.0	Wakayama Prefecture Route 18 north – to National Route 42, Arida
	79.1	49.2	Wakayama Prefecture Route 182 east
	81.1	50.4	Wakayama Prefecture Route 183 east – Ohara
	86.8	53.9	Wakayama Prefecture Route 184 east – Oishi Highland
Kainan	95.8	59.5	Wakayama Prefecture Route 169 east – Kōya, Kimino
	96.0	59.7	National Route 370 west / National Route 424 north (Sakai Bypass) – to National Route 42, central Kainan	Southern end of National Route 370 concurrency
	96.7	60.1	National Route 370 east (Nishi Kōya Kaidō) – Kōya	Northern end of National Route 370 concurrency
	97.6	60.6	Wakayama Prefecture Route 138 – Kuroiwa, Kimino
	102.1	63.4	Wakayama Prefecture Route 10 south – Kōya, Nokami Industrial Site	Southern end of Wakayama Prefecture Route 10 concurrency
Kinokawa	102.5	63.7	Wakayama Prefecture Route 10 north – Wakayama, Iwade	Northern end of Wakayama Prefecture Route 10 concurrency
	102.9	63.9	Wakayama Prefecture Route 129 east – Kaito
	104.6	65.0	Wakayama Prefecture Route 13 west – Wakayama	Southern end of Wakayama Prefecture Route 13 concurrency
	108.7	67.5	Wakayama Prefecture Route 128 north – to Keinawa Expressway, National Route 24 Wakayama Prefecture Route 130 west – Iwade
	109.4	68.0	Wakayama Prefecture Route 3 east – Kōya, Tomobuchi
	111.3	69.2	Wakayama Prefecture Route 13 east – Hashimoto, Katsuragi	Northern end of Wakayama Prefecture Route 13 concurrency
	112.6	70.0	Wakayama Prefecture Route 14 – Wakayama, Iwade, Nara, Hashimoto
	113.0	70.2	National Route 24 – Wakayama, Nara, Iwade, Hashimoto Wakayama Prefecture Route 62 north – to Keinawa Expressway, Izumisano, Kindai University	Northern terminus, road continues north as Wakayama Prefecture Route 62
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Route transition

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• Media related to Category:Route 424 (Japan) at Wikimedia Commons