[2] 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.

Water still flows beneath the expressway where the moat once was, but contained in below ground culverts.

[3] 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.

[5][6][7] 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.