# Kawaguchi Route

The Kawaguchi Route (川口線, Kawaguchi-sen), signed as Route S1, is one of the routes of the Shuto Expressway system serving the Greater Tokyo Area. The route is a 12.2-kilometer (7.6 mi) long radial highway running north from Adachi, Tokyo to Kawaguchi, Saitama. It primarily connects central Tokyo to the Tōhoku Expressway and points further north such as Sendai and Aomori.

## Route description

The speed limit is 60 km/h for the first 4 kilometers (2.5 mi) of the route between Kōhoku Junction and the Kaga exit and entrance. From the Kaga exit and entrance north to Kawaguchi Junction the speed limit is 80 km/h.

## History

The Kawaguchi Route was opened on 9 September 1987 alongside a section of the Central Circular Route. Upon opening, the expressway formed the first of many links between the expressways of northern Honshu to the expressways of the rest of the island and Kyushu. On 25 December 2002 access at Kōhoku Junction was extended to westbound traffic on the Central Circular Route.
On 20 July 2008, a project was completed on the Kawaguchi Parking Area to give its facilities a face-lift, add greenery, and to increase the size of its parking lot.

## Junction list

PA= Parking area, TB= Toll booth
| Prefecture | Location | km | mi | Exit | Name | Destinations | Notes |
| Tokyo | Adachi | 0.0 | 0.0 | — | Kōhoku | Central Circular Route (Shuto Expressway) – Ginza, Shinjuku | Southern terminus |
| Tokyo | Adachi | 1.4 | 0.87 | S01 | Shikahama Bridge | Tokyo Metropolitan Route 107 | Full access to and from northbound traffic; no access to southbound traffic |
| Tokyo | Adachi | 1.4 | 0.87 | S02 | Shikahama Bridge | Tokyo Metropolitan Route 318 (Kanana-dori) | Access only from northbound traffic to Route 318 |
| Saitama Prefecture | Kawaguchi | 3.7 | 2.3 | S04 | Higashi-Ryoke | Saitama Prefecture Route 107 (Kan-nana-dori) | Southbound exit only |
| Tokyo | Adachi | 4.0 | 2.5 | S05 | Kaga | Tokyo/Saitama Route 239 (Adachi-Kawaguchi Route) | Southbound entrance; northbound exit |
| Tokyo | Adachi | 6.0 | 3.7 | S06 | Adachi-iriya | Tokyo/Saitama Route 106 (Tokyo Hatogaya Route) / Tokyo/Saitama Route 239 (Adachi-Kawaguchi Route) | Southbound exit; northbound entrance |
| Saitama | Kawaguchi | 6.8 | 4.2 | S07 | Shingō | Saitama Prefecture Route 58 (Taitō-Kawaguchi Route) / Saitama Prefecture Route 239 (Adachi-Kawaguchi Route) | Southbound entrance; northbound exit |
| Saitama | Kawaguchi | 7.8 | 4.8 | S08 | Shingō | Saitama Prefecture Route 58 (Taitō-Kawaguchi Route) / Saitama Prefecture Route 239 (Adachi-Kawaguchi Route) | Southbound exit; northbound entrance |
| Saitama | Kawaguchi | 8.7 | 5.4 | S09 | Angyō | Saitama Prefecture Route 239 (Adachi-Kawaguchi Route) | Southbound entrance; northbound exit |
| Saitama | Kawaguchi | 10.6 | 6.6 | PA | Kawaguchi | | Accessible only by southbound traffic |
| Saitama | Kawaguchi | 10.7 | 6.6 | TB | Kawaguchi | | Southbound traffic only |
| Saitama | Kawaguchi | 11.1 | 6.9 | S11 | Araijuku | Saitama Prefecture Route 239 (Adachi-Kawaguchi Route) to – National Route 122 / National Route 298 | Southbound entrance; northbound exit |
| Saitama | Kawaguchi | 12.2 | 7.6 | — | Kawaguchi | Tokyo Gaikan Expressway Tōhoku Expressway north – Ōizumi, Misato | Northern terminus; expressway continues as the Tōhoku Expressway |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Incomplete access Route transition ||||||||