The “Akasaka 7-chome 2-ban District Type 1 Urban Redevelopment Project” (Akasaka 7-chome 2-ban District Urban Redevelopment Association; participating members: Nomura Real Estate Development Co., Ltd. and NIPPON STEEL KOWA REAL ESTATE Co., Ltd.), for which our firm is responsible for the urban planning and basic design, detailed design, and construction supervision (in a design joint venture with Shimizu Corporation), has been certified as an Excellent Green Space Preservation Plan and obtained the 2025 “TSUNAG Certification.”
Taking advantage of its location adjacent to the Akasaka Imperial Grounds and the Korekiyo Takahashi Memorial Park, the project aims to form a “Green Network” that extends the continuity of greenery toward the southern urban area. It will newly develop green spaces (green paths) and plazas integrated with the Korekiyo Takahashi Memorial Park, creating an urban environment that enhances the area’s ecological and environmental value.
In this certification, the project received a “★★” rating, with an “AA” grade for both “Quantity of Green Space” and “Quality of Green Space.” (The highest level for both categories is “AAA.”)
What is the “TSUNAG Certification”?
Under the jurisdiction of the Ministry of Land, Infrastructure, Transport and Tourism (MLIT), and as part of the “Town Development GX” initiative, the “Excellent Green-Space Securing Plan Recognition System (TSUNAG)” was established based on the revised Urban Green Space Act enacted in November 2024, with operations beginning in 2024 November.
The system enables the Minister of MLIT to evaluate and certify initiatives by corporations etc. in securing high quality green space — from the perspectives of green-space “quantity” and “quality” such as climate-change countermeasures, biodiversity conservation, and improvement of well-being.
