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.

Quick Facts Route information, Length ...

Kawaguchi Route
Route information
Maintained by Metropolitan Expressway Company Limited
Length	12.2 km (7.6 mi)
Existed	1987–present
Major junctions
South end	Kōhoku Junction [ja] in Adachi, Tokyo Central Circular Route (Shuto Expressway)
North end	Kawaguchi Junction [ja] in Kawaguchi, Saitama Tokyo Gaikan Expressway Tōhoku Expressway
Location
Country	Japan
Highway system
National highways of Japan Expressways of Japan

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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.

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.^[1]

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.^[2]

PA= Parking area, TB= Toll booth^[3]

More information Prefecture, Location ...

Prefecture	Location	km	mi	Exit	Name	Destinations	Notes
Tokyo	Adachi	0.0	0.0	—	Kōhoku	Central Circular Route (Shuto Expressway) – Ginza, Shinjuku	Southern terminus
		1.4	0.87	S01	Shikahama Bridge	Tokyo Metropolitan Route 107	Full access to and from northbound traffic; no access to southbound traffic
		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
		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
		7.8	4.8	S08	Shingō	Saitama Prefecture Route 58 (Taitō-Kawaguchi Route) / Saitama Prefecture Route 239 (Adachi-Kawaguchi Route)	Southbound exit; northbound entrance
		8.7	5.4	S09	Angyō	Saitama Prefecture Route 239 (Adachi-Kawaguchi Route)	Southbound entrance; northbound exit
		10.6	6.6	PA	Kawaguchi		Accessible only by southbound traffic
		10.7	6.6	TB	Kawaguchi		Southbound traffic only
		11.1	6.9	S11	Araijuku	Saitama Prefecture Route 239 (Adachi-Kawaguchi Route) to – National Route 122 / National Route 298	Southbound entrance; northbound exit
		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

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