| Country: | JPN |
| Type: | Expressway |
| Route: | San'yō |
| Map Custom: | yes |
| Length Km: | 446.7 |
| Length Notes: | 405.6 km (main line) 9.6 km (Miki branch line) 3.4 km (Hanshin branch line) 28.1 km (Ube branch line) |
| Established: | 1982-1997 |
| Terminus A: | Kobe JCT(Kobe 神戸, Hyōgo) |
| Cities: | Kobe, Himeji, Okayama, Fukuyama, Hiroshima, Iwakuni, Yamaguchi |
| Terminus B: | Yamaguchi JCT(Yamaguchi 山口, Yamaguchi) Shimonoseki JCT(Shimonoseki 下関, Yamaguchi) |
The (Asian Highway Network) 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.
| Number | Name | Connections | Distance from Kōbe (km) | Bus Stop | Notes | 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 | ○ | |||||
| style="background-color:#BFB;" | - | Ōgō PA | style="text-align:center;" | - | 7.3 | ||||
| style="background-color:#BFB;" | - | Ōgō BS | style="text-align:center;" | - | 12.3 | ○ | |||
| 2 | Miki JCT | for Akashi Kaikyō Bridge (Kimi Branch) | 15.4 | Miki | |||||
| style="background-color:#BFB;" | - | Shijimi BS | style="text-align:center;" | - | 16.8 | ○ | |||
| 3 | Miki-Higashi IC | Hyōgo Prefectural Route 85 | 18.0 | ||||||
| style="background-color:#BFB;" | - | Kurumi BS | style="text-align:center;" | - | 23.1 | ○ | |||
| style="background-color:#BFB;" | - | Miki SA | style="text-align:center;" | - | 25.5 | ||||
| 4 | Miki-Ono IC | National Route 175 (Miki-Ono Bypass) | 27.7 | ||||||
| style="background-color:#BFB;" | - | Ono BS | style="text-align:center;" | - | 30.2 | ○ | Ono | ||
| style="background-color:#BFB;" | - | Gongenko PA | style="text-align:center;" | - | 36.1 36.5 | ○ | for Kobe, Osaka for Okayama | Kakogawa | |
| 5 | Kakogawa-Kita IC | Hyōgo Prefectural Route 43 | 41.2 | ||||||
| style="background-color:#BFB;" | - | Shikitō BS | style="text-align:center;" | - | 46.5 | ○ | Himeji | ||
| 6 | San'yō Himeji-Higashi IC | National Route 372 Bantan Renraku Road | 49.8 | ||||||
| style="background-color:#BFB;" | - | Shiratori PA | style="text-align:center;" | - | 60.7 61.6 | ○ | for Kobe, Osaka for Okayama | ||
| 7 | San'yō Himeji-Nishi IC | National Route 29 (Himeji-Nishi Bypass) | 62.7 | ||||||
| 8 | Tatsuno IC | Hyōgo Prefectural Route 29 | 69.3 | ○ | Tatsuno | ||||
| 9 | Tatsuno-Nishi IC/SA | Hyōgo Prefectural Route 93 Hyōgo Prefectural Route 121 | 73.7 | ||||||
| 9-1 | Harima JCT | Harima Expressway | 74.7 | ||||||
| style="background-color:#BFB;" | - | Aioi BS | style="text-align:center;" | - | 78.3 | ○ | Aioi | ||
| 10 | Akō IC | Okayama/Hyōgo Prefectural Route 96 | 88.3 | ○ | Akō | ||||
| style="background-color:#BFB;" | - | Fukuishi PA | style="text-align:center;" | - | 95.0 | Bizen | Okayama | ||
| 11 | Bizen IC | National Route 2 | 98.8 | ||||||
| 12 | Wake IC | National Route 374 | 109.1 | Wake District, Wake | |||||
| style="background-color:#BFB;" | - | Seto PA | style="text-align:center;" | - | 116.9 117.7 | for Kobe for Okayama, Hiroshima | Higashi-ku, Okayama | ||
| style="background-color:#BFB;" | - | Seto JCT | Mimasaka-Okayama Road (planned) | 119.3 | Expected to open in 2022 | ||||
| 13 | San'yō IC | Okayama Prefectural Route 37 | 123.2 | △ | Akaiwa | ||||
| style="background-color:#BFB;" | - | Kasaiyama Tunnel | style="text-align:center;" | - | Kita-ku, Okayama | ||||
| 14 | Okayama IC | National Route 53 (Okayama-Kita Bypass) | 136.8 | △ | |||||
| 14-1 | Kibi SA/SIC | 138.4 | |||||||
| 15 | Okayama JCT | Okayama Expressway | 143.9 | style="text-align:center;" | - | ||||
| 16 | Kurashiki JCT | for Seto-Chūō Expressway (Hayashima Branch) | 150.3 | style="text-align:center;" | - | Kurashiki | |||
| 17 | Kurashiki IC | National Route 429 | 152.4 | ||||||
| 18 | Tamashima IC | Okayama Prefectural Route 54 | 161.9 | ||||||
| style="background-color:#BFB;" | - | Michiguchi PA | style="text-align:center;" | - | 166.5 | ||||
| 19 | Kamogata IC | Okayama Prefectural Route 155 | 171.9 | Asakuchi | |||||
| 20 | Kasaoka IC | Okayama Prefectural Route 34 | 180.1 | Kasaoka | |||||
| style="background-color:#BFB;" | - | Shinosaka PA | style="text-align:center;" | - | 185.3 | ||||
| 21 | Fukuyama-Higashi IC | National Route 182 (Fukuyama Loop Road) | 191.7 | Fukuyama | Hiroshima | ||||
| style="background-color:#BFB;" | - | Senda BS | style="text-align:center;" | - | 194.4 | ○ | |||
| 21-1 | Fukuyama SA/SIC | 200.3 200.5 | For Okayama, Osaka for Hiroshima | ||||||
| style="background-color:#BFB;" | - | Fukuyama-Hongō BS | style="text-align:center;" | - | 207.6 | ○ | |||
| 22 | Fukuyama-Nishi IC | National Route 2 (Matsunaga Bypass) | 208.6 | ||||||
| 22-1 | Onomichi JCT | Onomichi Expressway | 213.1 | Onomichi | |||||
| 23 | Onomichi IC | National Route 184 | 214.5 | ||||||
| style="background-color:#BFB;" | - | Yahata PA | style="text-align:center;" | - | 222.2 222.5 | For Hiroshima, Kitakyūshū for Okayama | Mihara | ||
| 24 | Mihara-Kui IC | National Route 486 Hiroshima Prefectural Route 25 | 227.2 | ||||||
| style="background-color:#BFB;" | - | Takasaka PA | style="text-align:center;" | - | 231.4 | ☆ | BS for connections only expressway entrance/exit prohibited | ||
| 24-1 | Hongō IC | Hiroshima Prefectural Route 82 | 238.5 | ||||||
| 25 | Kōchi IC | Hiroshima Prefectural Route 73 National Route 432 | 246.7 | ○ | Higashihiroshima | ||||
| style="background-color:#BFB;" | - | Kodani SA | style="text-align:center;" | - | 249.7 250.0 | For Hiroshima, Kitakyūshū for Fukuyama, Okayama | |||
| 25-1 | Takaya JCT | 252.8 | |||||||
| 26 | Saijō IC | Hiroshima Prefectural Route 59 National Route 375 (Misonō Bypass) | 257.8 | ◆ | |||||
| 27 | Shiwa IC | Hiroshima Prefectural Route 83 | 268.8 | ◆ | |||||
| style="background-color:#BFB;" | - | Okuya PA | style="text-align:center;" | - | 270.9 | ||||
| 28-1 28 | Hiroshima-Higashi IC | Hiroshima Expressway Route 1 Hiroshima Prefectural Route 70 | 279.2 | ○ | Higashi-ku, Hiroshima | ||||
| 29 | Hiroshima IC | National Route 54 (Gion Bypass) | 285.6 | Asaminami-ku, Hiroshima | |||||
| style="background-color:#BFB;" | - | Numata PA | style="text-align:center;" | - | 291.2 | ○ | |||
| 30 | Hiroshima JCT | Hiroshima Expressway | 293.1 | ||||||
| 31 | Itsukaichi IC | Hiroshima Prefectural Route 71 | 296.1 | Saeki-ku, Hiroshima | |||||
| 31-1 | Miyajima SA/SIC | 306.2 | Hatsukaichi | ||||||
| 32 | Hatsukaichi JCT | Hiroshima-Iwakuni Road for Hatsukaichi, Miyajima | 310.4 | ||||||
| 32-2 | Ōno IC | Hiroshima Prefectural Route 289 | 315.1 | ◆ | |||||
| 32-3 | Ōtake IC | National Route 2 | 323.4 | Ōtake | |||||
| <33> | Ōtake JCT | National Route 2 Iwakuni-Ōtake Road (planned) | 324.1 | ||||||
| style="background-color:#BFB;" | - | Sekido Tunnel | style="text-align:center;" | - | 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 | ◆ | |||||
| style="background-color:#BFB;" | - | Kuga PA | style="text-align:center;" | - | 344.2 | ||||
| 35 | Kuga IC | Yamaguchi Prefectural Route 70 | 346.7 | ○ | |||||
| 36 | Kumage IC | Yamaguchi Prefectural Route 8 | 358.9 | ○ | Shūnan | ||||
| style="background-color:#BFB;" | - | Kudamatsu SA | style="text-align:center;" | - | 364.8 | Kudamatsu | |||
| style="background-color:#BFB;" | - | Mimitori Tunnel | style="text-align:center;" | - | Ōsaka-bound 67 m Kitakyūshū-bound 72 m | Shūnan | |||
| 37 | Tokuyama-Higashi IC | National Route 2 (Shūnan Bypass) | 370.7 | ○ | |||||
| 38 | Tokuyama-Nishi IC | National Route 2 | 388.7 | ||||||
| style="background-color:#BFB;" | - | Tonomi PA | style="text-align:center;" | - | 392.2 | Hōfu | |||
| 39 | Hōfu-Higashi IC | National Route 2 (Hōfu Bypass) | 401.3 | for Hiroshima | |||||
| 40 | Hōfu-Nishi IC | 404.6 | △ | for Kitakyūshū | |||||
| style="background-color:#BFB;" | - | Sabagawa SA | style="text-align:center;" | - | 407.5 | ||||
| 41 | Yamaguchi-Minami IC | National Route 2 (Ogōri Bypass) | 413.2 | Yamaguchi | |||||
| (33) | Yamaguchi JCT | Chūgoku Expressway | 419.3 | style="text-align:center;" | - | ||||
| 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 | ||||||
| Number | Name | Connections | Distance from Kurashiki (km) | Bus Stop | Notes | Location | |
|---|---|---|---|---|---|---|---|
| 16 | Kurashiki JCT | for Hiroshima, Kōbe (Main Route) | 0.0 | style="text-align:center;" | - | 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 | |||||||
| Number | Name | Connections | Distance from Ube (km) | Bus Stop | Location | ||
|---|---|---|---|---|---|---|---|
| 42 | Ube JCT | Yamaguchi-Ube Road | 0.0 | style="text-align:center;" | - | Ube | |
| 43 | Ube IC | National Route 490 | 3.1 | ○ | |||
| 44 | Onoda IC | Yamaguchi Prefectural Route 71 | 13.2 | ○ | Sanyoonoda | ||
| style="background-color:#BFB;" | - | Suōnada PA | style="text-align:center;" | - | 20.6 | ○ | |
| 45 | Habe IC | National Route 2 (Asa-Habu Bypass) | 22.7 | ||||
| (35-2) | Shimonoseki JCT | Chūgoku Expressway | 28.1 | style="text-align:center;" | - | Shimonoseki |