Chuo-Nippon Land Building Joins Large-Scale Mixed-Use Redevelopment Directly Connected to Toranomon Station, With Height of Approx. 179 Meters

Urban planning procedures have begun for the redevelopment plan in the Kasumigaseki-Toranomon district, in which Chuo-Nippon Land Building is participating. In the approximately 1.4-hectare project area adjacent to Toranomon Station on the Tokyo Metro Ginza Line, the project will develop a 28-story office tower rising about 179 meters above ground in District A and a 12-story office-and-retail building in District B as an urban regeneration project under the National Strategic Special Zone program. Construction is scheduled to begin in fiscal 2031, with completion targeted for fiscal 2036.

The total gross floor area for the overall district will be about 161,200 square meters (approx. 48,760 tsubo) (approx. 1,735,360 sq. ft.). Against a designated floor-area ratio of 800%, District A is planned at approximately 1,600%. Primary uses will include offices, retail, and business support facilities. The project will also strengthen transportation hub functions by relocating a station entrance within the site, widening the unpaid concourse area, and extending the underground pedestrian network from Toranomon Hills Station.

In the Toranomon area, Mori Building has completed the five-building Toranomon Hills development, in which it invested about JPY 700 billion, and plans to submit an urban planning proposal in 2026 for the Toranomon 3-chome Project. The project sponsors position the current plan as the “last piece of the puzzle” in infrastructure improvements around Toranomon Station.

The plan will also include a tentative Global Public-Private Partnership HUB to support the development of international standards and private-sector certification rules, as well as residential and stay-type functions for startups. On the environmental side, the project will use natural energy through environmental voids and pursue decarbonization initiatives. In terms of disaster preparedness, it is planned to secure electricity for 72 hours during emergencies and provide facilities to accommodate people unable to return home.

Toranomon Area Redevelopment Timeline

Key Facts

• Project Name: Kasumigaseki-Toranomon District Development Plan

• Developer: Chuo-Nippon Land Building Co., Ltd.

• Location: Various sites in 1-chome Kasumigaseki, Chiyoda Ward, Tokyo, and 1-chome Toranomon, Minato Ward, Tokyo

• Nearest Station: Directly connected to Toranomon Station on the Tokyo Metro Ginza Line

• Construction Start: Fiscal 2031 (planned)

• Completion: Fiscal 2036 (planned)

• Overall District

  • Site Area: Approx. 1.4 hectares

  • Land Area: Approx. 2,441 tsubo (approx. 86,867 sq. ft.)

  • Gross Floor Area: Approx. 48,760 tsubo (approx. 1,735,360 sq. ft.)

• District A

  • Number of Floors: 28F / B4

  • Maximum Height: Approx. 179 m

  • Gross Floor Area: Approx. 45,920 tsubo (approx. 1,634,195 sq. ft.)

  • Primary Uses: Offices, retail, business support facilities, parking, and others

• District B

  • Number of Floors: 12F / B2

  • Maximum Height: Approx. 60 m

  • Gross Floor Area: Approx. 2,843 tsubo (approx. 101,156 sq. ft.)

  • Primary Uses: Offices, retail, and others