# Inner Circular Route

The Inner Circular Route (都心環状線, Toshin Kanjō-sen), signed as Route C1, is one of the routes of the Shuto Expressway system serving the central part of the Greater Tokyo Area. The route is a complete loop around the central Tokyo wards of Chiyoda, Chūō, and Minato, with a total length of 14.8 kilometers (9.2 mi). In addition to serving areas of central Tokyo, the Inner Circular Route also serves as the origin of the radial routes of the Shuto Expressway. A section of the expressway is built above the Shibuya River.

## History

The expressway was built between 1962 and 1967, partly in preparation for the 1964 Summer Olympics. In 2009, Tokyo private industries proposed funding a project to dismantle the elevated expressway and put them underground.
In May 2020, the Shuto Expressway Company received approval for plans to relocate 1.8 kilometers of the expressway underground between Kandabashi and Edobashi Junctions, in the area surrounding Nihonbashi Bridge as part of larger project to redevelop the financial district. Construction commenced with the permanent closure of the Edobashi and Gofukubashi entrance and exit ramps on 10 May 2021. Construction on the replacement tunnel is expected to be completed in 2035, making way for the removal of the bridge planned to be completed in 2040.

## List of interchanges

List of interchanges ordered clockwise beginning with Edobashi Junction. The entire expressway is in Tokyo.
| Location | km | mi | Exit | Name | Destinations | Notes |
| Chūō | 0.0 | 0.0 | — | Edobashi | Ueno Route north – Ueno   Mukojima Route north – Narita, Bayshore Route, Fukagawa Route, Tōhoku Expressway, Keiyō Road | Clockwise entrance, counterclockwise exit; distance posts reset to zero, eastern terminus of AH1 |
| Chūō | 0.8 | 0.50 | 11 | Takarachō | Yaesu-dōri | Clockwise exit, counterclockwise entrance |
| Chūō | 1.0 | 0.62 | — | Kyōbashi | Spur route to Tokyo Expressway | Clockwise exit, counterclockwise entrance |
| Chūō | 1.6 | 0.99 | 12 | Kyōbashi | Kajibashi-dōri – Kyōbashi, Eitaibashi | Clockwise entrance, counterclockwise exit |
| Chūō | 1.7– 1.9 | 1.1– 1.2 | 13/14 | Shintomichō | Tokyo Metropolitan Route 50 (Shin-Ōhashi-dōri) – Shin-Ōhashi, Tsukuda, Shiodome | Exit only |
| Chūō | 2.0– 2.5 | 1.2– 1.6 | 15/16 | Ginza | Ginchū-dōri | |
| Chūō | 3.2 | 2.0 | 18 | Shiodome | Kaigan-dōri – Shinbashi | Clockwise entrance, counterclockwise exit |
| Chūō | 3.4 | 2.1 | — | Shiodome | Yaesu Route north – Kita-Ikebukuro, Shin-Kyōbashi | Clockwise entrance, counterclockwise exit |
| Minato | 4.3 | 2.7 | — | Hamazakibashi | Haneda Route south – Haneda, Bayshore Route, Yokohane Route, Daiba Route, Tokyo Bay Aqua-Line, Higashi-Kantō Expressway | |
| Minato | 5.2– 5.7 | 3.2– 3.5 | 19/20 | Shiba-kōen | Tokyo Metropolitan Route 319 – to National Route 1, Hibiya, Roppongi, Kanasugi Bridge, Shinagawa | |
| Minato | 6.6 | 4.1 | — | Ichinohashi | Meguro Route south – Meguro, Togoshi | |
| Minato | 7.2 | 4.5 | 21 | Iikura | Tokyo Metropolitan Route 415 (Azabu-dōri) – Roppongi | |
| Minato | 7.8 | 4.8 | — | Tanimachi | Shibuya Route west – to Tōmei Expressway, Shibuya | Clockwise beginning of AH1 concurrency |
| Chiyoda | 8.8– 9.2 | 5.5– 5.7 | 23/24 | Kasumigaseki | Tokyo Metropolitan Route 415 (Roppongi-dōri) – Hibiya, Hanzōmon, Nagatachō | |
| Chiyoda | 10.2 | 6.3 | — | Miyakezaka | Shinjuku Route west – to Chūō Expressway, Shinjuku | |
| Chiyoda | 11.6 | 7.2 | 25 | Daikanchō | Uchibori-dōri – Kitanomaru Park | Clockwise exit, counterclockwise entrance |
| Chiyoda | 12.0 | 7.5 | 26 | Kitanomaru | Uchibori-dōri – Hitotsubashi | Clockwise entrance, counterclockwise exit |
| Chiyoda | 12.3 | 7.6 | — | Takebashi | Ikebukuro Route north – Ōmiya, Kita-Ikebukuro | |
| Chiyoda | 12.9– 13.2 | 8.0– 8.2 | 28/29 | Kandabashi | Hibiya-dōri – Ōtemachi | |
| Chiyoda | 13.3 | 8.3 | — | Kandabashi | Yaesu Route south – Marunouchi, Shinbashi | Clockwise exit, counterclockwise entrance |
| Chūō | 14.0 | 8.7 | 30 | Gofukubashi | Tokyo Metropolitan Route 405 (Sotobori-dōri) – Tokyo Station | Closed on 10 May 2021 Clockwise entrance, counterclockwise exit |
| Chūō | 14.2 | 8.8 | 31 | Edobashi | Tokyo Metropolitan Route 316 (Shōwa-dōri) | Closed on 10 May 2021' Clockwise exit, counterclockwise entrance |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Closed/former Concurrency terminus Incomplete access |||||||