| Ōimachi Line | |
| Native Name: | 大井町線 |
| Native Name Lang: | ja |
| Type: | Rapid transit |
| Locale: | Tokyo |
| Stations: | 16 |
| Daily Ridership: | 511,214 (FY2018)[1] |
| Electrification: | 1,500 V DC overhead catenary |
| Speed: | 95 km/h |
| Mapcolor: | Orange (#) |
| Map State: | collapsed |
The is a railway line in Japan operated by the private railway operator Tokyu Corporation. It extends from in Shinagawa, Tokyo to in Kawasaki, Kanagawa.
All-stations "Local" services are classified as blue and green. The latter runs on the express track between Futako-Tamagawa and Mizonokuchi and does not stop at Futako-Shinchi or Takatsu. Limited-stop "Express" services are also provided.
On weekends, two seven-car express trains per days are operated to/from and on the Tokyu Den-en-toshi Line. Also, a few trains are operated through down to in the late evenings. A few express trains during the holidays also serve from in the mornings, down in the evenings.
| No. | Station | Japanese | Distance (km) | Stops | Transfers | Location | |||
|---|---|---|---|---|---|---|---|---|---|
| "Blue" Local | "Green" Local | Express | |||||||
| 大井町 | 0.0 | Shinagawa | Tokyo | ||||||
| 下神明 | 0.8 | ||||||||