Nippon Steel Kowa Real Estate Starts Construction on Mid-Sized High-Grade Office Building in Akihabara

Nippon Steel Kowa Real Estate started construction in June 2026 on the tentatively named BIZCORE Akihabara Project in Iwamotocho 3-chome, Chiyoda Ward, Tokyo. The property will be the 12th building in the BIZCORE series of mid-sized high-grade office buildings, with completion scheduled for September 2028.

The building will have nine floors above ground, with a typical floor plate of approximately 212 tsubo (approx. 7,500 sq. ft.). The first floor will include the first restaurant space in the BIZCORE series, while the second through fourth floors will house WAW, a members-only shared office consisting of spaces ranging from 5 to 20 tsubo (approx. 180 to 710 sq. ft.). The development site is located along Yasukuni-dori Avenue, a three-minute walk from Iwamotocho Station on the Toei Shinjuku Line and a five-minute walk from Akihabara Station on the Tokyo Metro Hibiya Line.

The vacancy rate for office buildings within a five-minute walk of Akihabara Station with typical floor plates of less than 200 tsubo (approx. 7,100 sq. ft.) has been declining from approximately 5.4% at the end of September 2024, standing at approximately 2.0% recently, indicating tightening supply-demand conditions for small to mid-sized offices, according to research conducted by the editorial team based on estie office research. The property appears designed to accommodate a broad range of small to mid-sized floor-area needs and is likely aimed at capturing demand in the surrounding area. Recently, in May 2026, the 11th property in the series, BIZCORE Jimbocho II, was completed, as the company continues developing mid-sized office buildings in central Tokyo. （see related article:High-Grade Midsize Office Building Completed in Jimbocho by Nippon Steel Kowa Real Estate）

Key Facts

• Property Name: Tentatively Named BIZCORE Akihabara Project
• Developer: Nippon Steel Kowa Real Estate Co., Ltd.
• Location: 3-5-5 Iwamotocho, Chiyoda Ward, Tokyo
• Nearest Stations: Three-minute walk from Iwamotocho Station on the Toei Shinjuku Line / five-minute walk from Akihabara Station on the Tokyo Metro Hibiya Line / seven-minute walk from Akihabara Station on the JR Yamanote Line
• Construction Start: June 2026
• Completion: September 2028 (scheduled)
• Number of Floors: 9F (steel-frame structure)
• Area: Site area of approximately 318 tsubo (approx. 11,300 sq. ft.) / typical floor plate of approximately 212 tsubo (approx. 7,500 sq. ft.) / Gross Floor Area of approximately 2,390 tsubo (approx. 85,000 sq. ft.)
• Design: Nishimatsu Construction Co., Ltd., Kanto Architectural Branch, First-Class Architect Office
• Construction: Nishimatsu Construction Co., Ltd., Kanto Architectural Branch