San'yō Expressway

San'yō Expressway
山陽自動車道
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Route information
Part of AH1
Length	446.7 km (277.6 mi) 405.6 km (main line) 9.6 km () 3.4 km (Hanshin branch line) 28.1 km (Ube branch line)
Existed	1982-1997–present
Major junctions
From	Kobe JCT(Kobe 神戸, Hyōgo)
To	Yamaguchi JCT(Yamaguchi 山口, Yamaguchi) Shimonoseki JCT(Shimonoseki 下関, Yamaguchi)
Location
Major cities	Kobe, Himeji, Okayama, Fukuyama, Hiroshima, Iwakuni, Yamaguchi
Highway system
National highways of Japan Expressways of Japan

The San'yō Expressway (山陽自動車道, San'yō Jidōshadō) (Asian Highway Network AH1) is an expressway in Japan, running from Kobe through Hiroshima along the Inland Sea and terminating in Yamaguchi Prefecture. The entire length of the expressway was opened in 1997. The main line has a total length of 405.6 kilometers.

List of interchanges and features[]

• IC - interchange, SIC - smart interchange, JCT - junction, SA - service area, PA - parking area, BS - bus stop, TN - tunnel, TB - toll gate, BR - bridge
• Bus stops labeled "○" are currently in use; those marked "◆" are closed.

Main Route[]

Number	Name	Connections	Distance from (km)	Bus Stop	Notes	Location
Through to Shin-Meishin Expressway
(5-1)		Chūgoku Expressway	0.0			Kita-ku, Kobe	Hyōgo
1	/		2.6	○
-		-	7.3
-		-	12.3	○
2		for Akashi Kaikyō Bridge (Kimi Branch)	15.4			Miki
-		-	16.8	○
3			18.0
-		-	23.1	○
-		-	25.5
4		National Route 175 (Miki-Ono Bypass)	27.7
-		-	30.2	○		Ono
-		-	36.1 36.5	○	for Kobe, Osaka for Okayama	Kakogawa
5			41.2
-		-	46.5	○		Himeji
6		National Route 372 Bantan Renraku Road	49.8
-		-	60.7 61.6	○	for Kobe, Osaka for Okayama
7		National Route 29 ()	62.7
8			69.3	○		Tatsuno
9	/		73.7
9-1		Harima Expressway	74.7
-		-	78.3	○		Aioi
10			88.3	○		Akō
-		-	95.0			Bizen	Okayama
11		National Route 2	98.8
12		National Route 374	109.1			Wake District, Wake
-		-	116.9 117.7		for Kobe for Okayama, Hiroshima	Higashi-ku, Okayama
-		(planned)	119.3		Expected to open in 2022
13			123.2	△		Akaiwa
-		-				Kita-ku, Okayama
14		National Route 53 ()	136.8	△
14-1			138.4
15		Okayama Expressway	143.9	-
16		for Seto-Chūō Expressway (Hayashima Branch)	150.3	-		Kurashiki
17		National Route 429	152.4
18			161.9
-		-	166.5
19			171.9			Asakuchi
20			180.1			Kasaoka
-		-	185.3
21		National Route 182 ()	191.7			Fukuyama	Hiroshima
-		-	194.4	○
21-1			200.3 200.5		For Okayama, Osaka for Hiroshima
-		-	207.6	○
22		National Route 2 ()	208.6
22-1		Onomichi Expressway	213.1			Onomichi
23		National Route 184	214.5
-		-	222.2 222.5		For Hiroshima, Kitakyūshū for Okayama	Mihara
24		National Route 486	227.2
-		-	231.4	☆	BS for connections only expressway entrance/exit prohibited
24-1			238.5
25		National Route 432	246.7	○		Higashihiroshima
-		-	249.7 250.0		For Hiroshima, Kitakyūshū for Fukuyama, Okayama
25-1		Higashihiroshima-Kure Expressway	252.8
26		National Route 375 ()	257.8	◆
27			268.8	◆
-		-	270.9
28-1 28		Hiroshima Expressway Route 1	279.2	○		Higashi-ku, Hiroshima
29		National Route 54 ()	285.6			Asaminami-ku, Hiroshima
-		-	291.2	○
30		Hiroshima Expressway	293.1
31			296.1			Saeki-ku, Hiroshima
31-1			306.2			Hatsukaichi
32		Hiroshima-Iwakuni Road for , Miyajima	310.4
32-2			315.1	◆
32-3		National Route 2	323.4			Ōtake
<33>		National Route 2 (planned)	324.1
-		-			Ōsaka-bound 3,325 m Kitakyūshū-bound 3,217 m	Iwakuni	Yamaguchi
34		National Route 2	332.6	◆
-		-	344.2
35			346.7	○
36			358.9	○		Shūnan
-		-	364.8			Kudamatsu
-		-			Ōsaka-bound 67 m Kitakyūshū-bound 72 m	Shūnan
37		National Route 2 ()	370.7	○
38		National Route 2	388.7
-		-	392.2			Hōfu
39		National Route 2 ()	401.3		for Hiroshima
40			404.6	△	for Kitakyūshū
-		-	407.5
41		National Route 2 ()	413.2			Yamaguchi
(33)		Chūgoku Expressway	419.3	-

Kimi Branch[]

Number	Name	Connections	Distance from (km)	Notes	Location
2		Main Route	0.0		Miki
1	/		9.6	TB is on Miki-bound side	Nishi-ku, Kobe
Kobe-Awaji-Naruto Expressway for Tokushima

Hayashima Branch[]

Number	Name	Connections	Distance from (km)	Bus Stop	Notes	Location
16		for , (Main Route)	0.0	-		Kurashiki
1		National Route 2 ()	3.4	◆	Toll gate is on Kōbe/Hiroshima-bound side	Hayashima, Tsukubo District
Seto-Chūō Expressway for ,

Ube-Shimonoseki Route[]

Number	Name	Connections	Distance from (km)	Bus Stop	Location
42			0.0	-	Ube
43		National Route 490	3.1	○
44			13.2	○	Sanyoonoda
-		-	20.6	○
45		National Route 2 ()	22.7
(35-2)		Chūgoku Expressway	28.1	-	Shimonoseki

See also[]

• West Nippon Expressway Company