JR East platforms are located in the above ground portion of Kannai Station.
| 1 | ■Keihin-Tōhoku Line ■Negishi Line | Isogo ・Ōfuna |
| 2 | ■Keihin-Tōhoku Line ■Negishi Line | Yokohama・Tokyo・Ōmiya |
| ■Yokohama Line | Shin-Yokohama・Machida・Hachiōji |
The Yokohama Municipal Subway is located on the 2nd & 3rd underground floors, north of the main station.
| 2 | ■Line 1 | Totsuka ・ Shōnandai |
| 4 | ■Line 3 | Yokohama ・ Shin-Yokohama ・ Azamino |