Mitsui & Co. Urban Development Starts Construction on Compact Office Building in Minato Ward’s Nishi-Shimbashi
Mitsui & Co. Urban Development began construction in April 2026 on the tentatively named Nishi-Shimbashi 2-chome Office Project in Nishi-Shimbashi, Minato Ward, Tokyo. The project site is a four-minute walk from Uchisaiwaicho Station on the Toei Mita Line, a five-minute walk from Toranomon Station on the Tokyo Metro Ginza Line and a seven-minute walk from JR Shimbashi Station.
The building will be an 11-story office and retail property with about 592 tsubo (approx. 64,700 sq. ft.) of Gross Floor Area. The typical floor plate will be about 52 tsubo (approx. 5,700 sq. ft.), and all 10 office floors are expected to be marketed for lease as single-tenant, prebuilt office floors. A full-width balcony will be installed on the north side of the building, while the first floor will include a restaurant space of about 20 tsubo (approx. 2,200 sq. ft.), apparently aiming to capture retail demand from nearby office workers and visitors to the area.
Mitsui & Co. Urban Development owns and operates Hibiya Fort Tower, Hibiya Central Building and Bussan Building in the area. In January 2025, the company announced WORKING FORT, an urban compact office brand for central Tokyo, and completed the first property under the brand, WORKING FORT Higashi-Kanda, in September that year. This project appears likely to be the brand’s second development.
Key Facts
Project Name: Tentatively named Nishi-Shimbashi 2-chome Office Project
Developer: Mitsui & Co. Urban Development Co., Ltd.
Location: 2-6-1 Nishi-Shimbashi, Minato Ward, Tokyo
Nearest Stations: Four-minute walk from Uchisaiwaicho Station on the Toei Mita Line; five-minute walk from Toranomon Station on the Tokyo Metro Ginza Line; seven-minute walk from Shimbashi Station on JR lines
Construction Start: April 2026
Completion: January 2028
Number of Floors: 11F
Structure: Steel-frame construction
Use: Office and retail
Area: Site area of about 80 tsubo (approx. 8,600 sq. ft.); Gross Floor Area of about 592 tsubo (approx. 64,700 sq. ft.); typical floor area of about 52 tsubo (approx. 5,700 sq. ft.)