| Country: | JPN |
| Type: | Expressway |
| Route: | Matsue |
| Length Km: | 71.6 |
| Established: | 2003 |
| Terminus A: | Miyoshi-Higashi Junction/IC in Miyoshi, Hiroshima Chūgoku Expressway |
| Cities: | Shōbara, Unnan |
| Terminus B: | Shinji Junction in Matsue, Shimane San-in Expressway |
The is a national expressway in the Chūgoku region of Japan. It is owned and operated by West Nippon Expressway Company.
The expressway is officially referred to as the Chūgoku-Ōdan Expressway Onomichi Matsue Route. The route connects the city of Matsue with the Chugoku Expressway in Hiroshima Prefecture.
The first section of the expressway was opened in 2003. The final section of the expressway (48.7 km between Miyoshi-Higashi Junction and Yoshida-Kakeya Interchange) was opened on March 30, 2013.
The section between Miyoshi-Higashi Junction and Mitoya-Kisuki Interchange is toll-free; all other sections assess tolls based on distance travelled in the same manner as most other national expressways.
| No. | Name | Connections | Dist. from Origin | Bus Stop | Notes | Location | |
|---|---|---|---|---|---|---|---|
| Through to Onomichi Expressway | |||||||
| (21-1) 1 | Miyoshi-Higashi JCT Miyoshi-Higashi IC | Chūgoku Expressway Hiroshima Prefectural Route 434 | 0.0 | Miyoshi | Hiroshima | ||
| 2 | Kuchiwa IC | 13.3 | Shōbara | ||||
| 3 | Takano IC | 28.8 | △ | ||||
| 4 | Unnan-Yoshida IC | 44.9 | △ | Unnan | Shimane | ||
| 5 | Yoshida-Kakeya IC | Shimane Prefectural Route 336 | 48.7 | ||||
| BS | Kisuki BS | 60.5 | ○ | ||||
| 6 | Mitoya-Kisuki IC | Shimane Prefectural Route 332 | 61.0 | ||||
| TB | Mitoya-Kisuki TB | 61.2 | |||||
| BS | Kamo BS | 66.0 | ○ | ||||
| PA | Kamo-Iwakura PA | 68.2 | |||||
| 29 | Shinji JCT | San-in Expressway | 71.6 | Matsue | |||