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Mitsui Fudosan Starts Construction of Hybrid Timber Office in Nihonbashi-Honcho

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Mitsui Fudosan Starts Construction of Hybrid Timber Office in Nihonbashi-Honcho

Mitsui Fudosan Starts Construction of Hybrid Timber Office in Nihonbashi-Honcho

Mitsui Fudosan has begun construction of a hybrid timber rental office building in Nihonbashi-Honcho 1-chome in November 2025.

The upper floors (8–11F) will feature a fully timber structure—including floors, walls, columns, and beams—with extensive use of wood in interior finishes as well. By utilizing timber sourced in part from forests owned by the Mitsui Fudosan Group and reusing existing foundation piles, the company expects to reduce CO₂ emissions during construction by approximately 25% compared to conventional steel-frame structures.

The project, totaling approximately 5,445 tsubo (approx. 179,900 sq. ft.) of gross floor area, is expected to obtain Nearly ZEB certification for its office areas. The design is handled by Yamashita Sekkei, with construction by Obayashi Corporation, and completion is scheduled for February 2028.

This will be Mitsui Fudosan’s second timber office project in the Nihonbashi area, following the “Nihonbashi-Honcho Mitsui Building &forest.” The development aims to symbolize urban timber architecture that combines high environmental performance with workplace comfort.

Located along Edozakura-dori, near COREDO Muromachi, the project offers excellent access to central Tokyo and benefits from the area’s strong pedestrian flow. Mitsui Fudosan aims to attract ESG-oriented tenants while pursuing energy efficiency in HVAC and lighting systems to reduce environmental impact throughout both construction and operations.

Key Facts

  • Project Name: (Tentative) Nihonbashi-Honcho 1-Chome 5-Ban Block Project

  • Developer: Mitsui Fudosan Co., Ltd.

  • Location: 5 Nihonbashi-Honcho 1-chome, Chuo-ku, Tokyo

  • Nearest Stations: Mitsukoshimae Station (Tokyo Metro Ginza & Hanzomon Lines, 3-min walk) / Shin-Nihombashi Station (JR Sobu Line, 4-min walk) / Nihombashi Station (Tokyo Metro Tozai Line, 5-min walk)

  • Start of Construction: November 2025

  • Completion: February 2028 (planned)

  • Number of Floors: 11F / B1

  • Gross Floor Area: approx. 5,445 tsubo (approx. 179,900 sq. ft.)

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