# San'yō Expressway

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 Kōbe (km) | Bus Stop | Notes | Location | Location |
| Through to Shin-Meishin Expressway ||||||||
| (5-1) | Kōbe JCT | Chūgoku Expressway | 0.0 | | | Kita-ku, Kobe | Hyōgo |
| 1 | Kōbe-Kita IC/ Hata BS | Rokkō-Kita Toll Road | 2.6 | ○ | | Kita-ku, Kobe | Hyōgo |
| - | Ōgō PA | - | 7.3 | | | Kita-ku, Kobe | Hyōgo |
| - | Ōgō BS | - | 12.3 | ○ | | Kita-ku, Kobe | Hyōgo |
| 2 | Miki JCT | for Akashi Kaikyō Bridge (Kimi Branch) | 15.4 | | | Miki | Hyōgo |
| - | Shijimi BS | - | 16.8 | ○ | | Miki | Hyōgo |
| 3 | Miki-Higashi IC | Hyōgo Prefectural Route 85 | 18.0 | | | Miki | Hyōgo |
| - | Kurumi BS | - | 23.1 | ○ | | Miki | Hyōgo |
| - | Miki SA | - | 25.5 | | | Miki | Hyōgo |
| 4 | Miki-Ono IC | National Route 175 (Miki-Ono Bypass) | 27.7 | | | Miki | Hyōgo |
| - | Ono BS | - | 30.2 | ○ | | Ono | Hyōgo |
| - | Gongenko PA | - | 36.1 36.5 | ○ | for Kobe, Osaka for Okayama | Kakogawa | Hyōgo |
| 5 | Kakogawa-Kita IC | Hyōgo Prefectural Route 43 | 41.2 | | | Kakogawa | Hyōgo |
| - | Shikitō BS | - | 46.5 | ○ | | Himeji | Hyōgo |
| 6 | San'yō Himeji-Higashi IC | National Route 372 Bantan Renraku Road | 49.8 | | | Himeji | Hyōgo |
| - | Shiratori PA | - | 60.7 61.6 | ○ | for Kobe, Osaka for Okayama | Himeji | Hyōgo |
| 7 | San'yō Himeji-Nishi IC | National Route 29 (Himeji-Nishi Bypass) | 62.7 | | | Himeji | Hyōgo |
| 8 | Tatsuno IC | Hyōgo Prefectural Route 29 | 69.3 | ○ | | Tatsuno | Hyōgo |
| 9 | Tatsuno-Nishi IC/SA | Hyōgo Prefectural Route 93 Hyōgo Prefectural Route 121 | 73.7 | | | Tatsuno | Hyōgo |
| 9-1 | Harima JCT | Harima Expressway | 74.7 | | | Tatsuno | Hyōgo |
| - | Aioi BS | - | 78.3 | ○ | | Aioi | Hyōgo |
| 10 | Akō IC | Okayama/Hyōgo Prefectural Route 96 | 88.3 | ○ | | Akō | Hyōgo |
| - | Fukuishi PA | - | 95.0 | | | Bizen | Okayama |
| 11 | Bizen IC | National Route 2 | 98.8 | | | Bizen | Okayama |
| 12 | Wake IC | National Route 374 | 109.1 | | | Wake District, Wake | Okayama |
| - | Seto PA | - | 116.9 117.7 | | for Kobe for Okayama, Hiroshima | Higashi-ku, Okayama | Okayama |
| - | Seto JCT | Mimasaka-Okayama Road (planned) | 119.3 | | Expected to open in 2022 | Higashi-ku, Okayama | Okayama |
| 13 | San'yō IC | Okayama Prefectural Route 37 | 123.2 | △ | | Akaiwa | Okayama |
| - | Kasaiyama Tunnel | - | | | | Kita-ku, Okayama | Okayama |
| 14 | Okayama IC | National Route 53 (Okayama-Kita Bypass) | 136.8 | △ | | Kita-ku, Okayama | Okayama |
| 14-1 | Kibi SA/SIC | | 138.4 | | | Kita-ku, Okayama | Okayama |
| 15 | Okayama JCT | Okayama Expressway | 143.9 | - | | Kita-ku, Okayama | Okayama |
| 16 | Kurashiki JCT | for Seto-Chūō Expressway (Hayashima Branch) | 150.3 | - | | Kurashiki | Okayama |
| 17 | Kurashiki IC | National Route 429 | 152.4 | | | Kurashiki | Okayama |
| 18 | Tamashima IC | Okayama Prefectural Route 54 | 161.9 | | | Kurashiki | Okayama |
| - | Michiguchi PA | - | 166.5 | | | Kurashiki | Okayama |
| 19 | Kamogata IC | Okayama Prefectural Route 155 | 171.9 | | | Asakuchi | Okayama |
| 20 | Kasaoka IC | Okayama Prefectural Route 34 | 180.1 | | | Kasaoka | Okayama |
| - | Shinosaka PA | - | 185.3 | | | Kasaoka | Okayama |
| 21 | Fukuyama-Higashi IC | National Route 182 (Fukuyama Loop Road) | 191.7 | | | Fukuyama | Hiroshima |
| - | Senda BS | - | 194.4 | ○ | | Fukuyama | Hiroshima |
| 21-1 | Fukuyama SA/SIC | | 200.3 200.5 | | For Okayama, Osaka for Hiroshima | Fukuyama | Hiroshima |
| - | Fukuyama-Hongō BS | - | 207.6 | ○ | | Fukuyama | Hiroshima |
| 22 | Fukuyama-Nishi IC | National Route 2 (Matsunaga Bypass) | 208.6 | | | Fukuyama | Hiroshima |
| 22-1 | Onomichi JCT | Onomichi Expressway | 213.1 | | | Onomichi | Hiroshima |
| 23 | Onomichi IC | National Route 184 | 214.5 | | | Onomichi | Hiroshima |
| - | Yahata PA | - | 222.2 222.5 | | For Hiroshima, Kitakyūshū for Okayama | Mihara | Hiroshima |
| 24 | Mihara-Kui IC | National Route 486 Hiroshima Prefectural Route 25 | 227.2 | | | Mihara | Hiroshima |
| - | Takasaka PA | - | 231.4 | ☆ | BS for connections only expressway entrance/exit prohibited | Mihara | Hiroshima |
| 24-1 | Hongō IC | Hiroshima Prefectural Route 82 | 238.5 | | | Mihara | Hiroshima |
| 25 | Kōchi IC | Hiroshima Prefectural Route 73 National Route 432 | 246.7 | ○ | | Higashihiroshima | Hiroshima |
| - | Kodani SA | - | 249.7 250.0 | | For Hiroshima, Kitakyūshū for Fukuyama, Okayama | Higashihiroshima | Hiroshima |
| 25-1 | Takaya JCT | Higashihiroshima-Kure Expressway | 252.8 | | | Higashihiroshima | Hiroshima |
| 26 | Saijō IC | Hiroshima Prefectural Route 59 National Route 375 (Misonō Bypass) | 257.8 | ◆ | | Higashihiroshima | Hiroshima |
| 27 | Shiwa IC | Hiroshima Prefectural Route 83 | 268.8 | ◆ | | Higashihiroshima | Hiroshima |
| - | Okuya PA | - | 270.9 | | | Higashihiroshima | Hiroshima |
| 28-1 28 | Hiroshima-Higashi IC | Hiroshima Expressway Route 1 Hiroshima Prefectural Route 70 | 279.2 | ○ | | Higashi-ku, Hiroshima | Hiroshima |
| 29 | Hiroshima IC | National Route 54 (Gion Bypass) | 285.6 | | | Asaminami-ku, Hiroshima | Hiroshima |
| - | Numata PA | - | 291.2 | ○ | | Asaminami-ku, Hiroshima | Hiroshima |
| 30 | Hiroshima JCT | Hiroshima Expressway | 293.1 | | | Asaminami-ku, Hiroshima | Hiroshima |
| 31 | Itsukaichi IC | Hiroshima Prefectural Route 71 | 296.1 | | | Saeki-ku, Hiroshima | Hiroshima |
| 31-1 | Miyajima SA/SIC | | 306.2 | | | Hatsukaichi | Hiroshima |
| 32 | Hatsukaichi JCT | Hiroshima-Iwakuni Road for Hatsukaichi, Miyajima | 310.4 | | | Hatsukaichi | Hiroshima |
| 32-2 | Ōno IC | Hiroshima Prefectural Route 289 | 315.1 | ◆ | | Hatsukaichi | Hiroshima |
| 32-3 | Ōtake IC | National Route 2 | 323.4 | | | Ōtake | Hiroshima |
| <33> | Ōtake JCT | National Route 2 Iwakuni-Ōtake Road (planned) | 324.1 | | | Ōtake | Hiroshima |
| - | Sekido Tunnel | - | | | Ōsaka-bound 3,325 m Kitakyūshū-bound 3,217 m | Iwakuni | Yamaguchi |
| 34 | Iwakuni IC | National Route 2 Yamaguchi/Hiroshima Prefectural Route 1 | 332.6 | ◆ | | Iwakuni | Yamaguchi |
| - | Kuga PA | - | 344.2 | | | Iwakuni | Yamaguchi |
| 35 | Kuga IC | Yamaguchi Prefectural Route 70 | 346.7 | ○ | | Iwakuni | Yamaguchi |
| 36 | Kumage IC | Yamaguchi Prefectural Route 8 | 358.9 | ○ | | Shūnan | Yamaguchi |
| - | Kudamatsu SA | - | 364.8 | | | Kudamatsu | Yamaguchi |
| - | Mimitori Tunnel | - | | | Ōsaka-bound 67 m Kitakyūshū-bound 72 m | Shūnan | Yamaguchi |
| 37 | Tokuyama-Higashi IC | National Route 2 (Shūnan Bypass) | 370.7 | ○ | | Shūnan | Yamaguchi |
| 38 | Tokuyama-Nishi IC | National Route 2 | 388.7 | | | Shūnan | Yamaguchi |
| - | Tonomi PA | - | 392.2 | | | Hōfu | Yamaguchi |
| 39 | Hōfu-Higashi IC | National Route 2 (Hōfu Bypass) | 401.3 | | for Hiroshima | Hōfu | Yamaguchi |
| 40 | Hōfu-Nishi IC | National Route 2 (Hōfu Bypass) | 404.6 | △ | for Kitakyūshū | Hōfu | Yamaguchi |
| - | Sabagawa SA | - | 407.5 | | | Hōfu | Yamaguchi |
| 41 | Yamaguchi-Minami IC | National Route 2 (Ogōri Bypass) | 413.2 | | | Yamaguchi | Yamaguchi |
| (33) | Yamaguchi JCT | Chūgoku Expressway | 419.3 | - | | Yamaguchi | Yamaguchi |

### Kimi Branch

| Number | Name | Connections | Distance from Miki (km) | Notes | Location |
| 2 | Miki JCT | Main Route | 0.0 | | Miki |
| 1 | Kōbe-Nishi IC/TB | Hyōgo Prefectural Route 22 | 9.6 | TB is on Miki-bound side | Nishi-ku, Kobe |
| Kobe-Awaji-Naruto Expressway for Tokushima ||||||

### Hayashima Branch

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

### Ube-Shimonoseki Route

| Number | Name | Connections | Distance from Ube (km) | Bus Stop | Location |
| 42 | Ube JCT | Yamaguchi-Ube Road | 0.0 | - | Ube |
| 43 | Ube IC | National Route 490 | 3.1 | ○ | Ube |
| 44 | Onoda IC | Yamaguchi Prefectural Route 71 | 13.2 | ○ | Sanyoonoda |
| - | Suōnada PA | - | 20.6 | ○ | Sanyoonoda |
| 45 | Habe IC | National Route 2 (Asa-Habu Bypass) | 22.7 | | Sanyoonoda |
| (35-2) | Shimonoseki JCT | Chūgoku Expressway | 28.1 | - | Shimonoseki |