# Tokyo Expressway

The Tokyo Expressway (東京高速道路, Tōkyō Kōsoku Dōro), also known as the KK Route, is a 2.0-kilometer-long (1.2 mi) untolled expressway in central Tokyo owned and maintained by the Tokyo Expressway Company (Tōkyō Kōsoku Dōro K.K.). It is signed as D8. It runs in a semicircular loop around the Ginza district of Chūō-ku. The loop is closed by part of the Inner Circular Route of the Shuto Expressway. The majority of the expressway will be closed to vehicular traffic in 2025 to be converted into an elevated park owned by the Tokyo Expressway Company known as the Tokyo Sky Park.

## Route description

The Tokyo Expressway is a 2.0-kilometer-long (1.2 mi) privately-owned highway enclosing all but the eastern border of Tokyo's Ginza district. It is connected to the Inner Circular Route of the Shuto Expressway at both ends indirectly. The expressway is funded by rent collected by the Tokyo Expressway Company. Due to this business structure, unlike the majority of expressways in Japan, it is free for public use due to the rental income generated from the commercial spaces owned by the expressway company located underneath the expressway's right-of-way.

## History

In 1951, 23 business leaders founded the Tokyo Expressway Company Limited with the goal of revitalizing Ginza after the war and easing congestion of automobile traffic. The expressway was built upon infill of the outer moat surrounding Ginza. Water still flows beneath the expressway where the moat once was, but contained in below ground culverts. Portions of the highway were opened in 1959, making it the oldest expressway in Japan. The Tokyo Expressway was completed in 1966.

### Elevated park conversion

In December 2023, it was decided by the Tokyo Expressway Company that the entire route would be permanently closed in April 2025 to automobile traffic with the exception of the portion of the expressway connecting the Inner Circular Route to the Higashi-Ginza exit. The closure is slated to convert the elevated expressway right of way into an elevated park similar to the Coulée verte René-Dumont in Paris or the High Line in New York City. The Tokyo Expressway Company will continue to operate as the owners of the elevated park, referred to as the Tokyo Sky Corridor by the Tokyo Metropolitan Government, and the remaining segment of the expressway. Vehicular traffic from the Tokyo Expressway and a portion of the Inner Circular Route will be rerouted to connect to the Yaesu Route with a tunnel called the Shinkyobashi Connector by 2040.
Tokyo's governor, Yuriko Koike approved of the concept for the future of the Tokyo Expressway, stating that "it is an incredible dream to have roads in the middle of the city turn green". A three day event was held by the Tokyo Metropolitan Government and the Tokyo Expressway Company from 4-6 May 2024 during the Golden Week holidays, where the expressway was temporarily turned into a pedestrian zone to promote the project, simulate the completed park, and get feedback from the public. The majority of attendees approved of the premise of the future elevated park and felt that it would be a pedestrian-friendly environment.

## List of interchanges

The entire expressway is in Tokyo.
| Location | km | mi | Exit | Name | Destinations | Notes |
| Through to Inner Circular Route |||||||
| Chūō | 0.0 | 0.0 | — | Shiodome Toll Gate | Yaesu Route – to Haneda | Southern terminus of the Tokyo Expressway; highway continues as the Shiodome spur of the Yaesu Route to Shiodome Junction. To be closed in April 2025. |
| Chūō | 0.0 | 0.0 | 1 | Shinbashi | Tokyo Metropolitan Route 316 (Shōwa-dōri) / Gomon-dōri | Entrance only from Tokyo Metropolitan Route 316, exit only to Gomon-dōri. To be closed in April 2025. |
| Chūō | 0.5 | 0.31 | 2 | Dobashi | Tokyo Metropolitan Route 405 | Entrance only from Tokyo Metropolitan Route 405. To be closed in April 2025. |
| Chūō | 1.4 | 0.87 | — | Nishi-Ginza | Yaesu Route – to Kita-Ikebukuro | Northbound exit, southbound entrance. To be closed in April 2025. |
| Chūō | 1.4 | 0.87 | 3 | Nishi-Ginza | Yanagi-dōri / Ginza Sakura-dōri | Entrance only from Yanagi-dōri. To be closed in April 2025. |
| Chūō | 1.7 | 1.1 | 4 | Shinkyobashi | Tokyo Metropolitan Route 316 (Shōwa-dōri) | Northbound exit. To be closed in April 2025. |
| Chūō | 1.9 | 1.2 | 5 | Higashi-Ginza | Tokyo Metropolitan Route 316 (Shōwa-dōri) | Southbound exit. |
| Chūō | 2.0 | 1.2 | — | Shirauobashi Toll Gate | Inner Circular Route – Ueno, Kandabashi | Northern terminus of the Tokyo Expressway; highway continues as the Kyobashi spur of the Inner Circular Route to Kyobashi Junction. Northbound route to be closed in April 2025. |
| Through to Inner Circular Route |||||||
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Incomplete access Route transition |||||||