In Japan where buildings have been repeatedly renovated through the cycle of building and demolishing, the life of buildings are said to be shorter than those in Europe and the U.S. Construction of buildings requires huge amounts of materials and energy and rebuilding in a short period of time can cause a massive amount of waste to be produced.
Under the premise that short-lived buildings will lead to the waste of energy and resources and the production of a large amount of waste substances, Mitsui Fudosan believes that providing buildings with a long life is important for reducing the environmental impact of buildings through their entire lifecycles. We work to create buildings with longer lives by increasing their durability and designing them in ways that make them easier to renovate and remodel. In addition, we are making efforts to use recycled materials to contribute to the formation of a recycling-oriented society by pursuing resource saving.

To extend the life of office buildings, we believe that it is of utmost importance to provide buildings that are not only highly seismic-resistant and durable but also usable over a long term despite changes in work styles that continue to change over time. Thus, we endeavor to create designs that are easy to renovate and remodel through such measures as enhancing floor load and air-conditioning capabilities, assuring space for replacing equipment and air-conditioning piping, and employing external shafts that enable easy renovation of piping and ducts.

With for-sale and rental condominiums, we employ measures to reduce concrete deterioration, use building materials that are highly durable, highly fire-proof and allow easy maintenance in the standard design. In addition, we work to extend the life of buildings through easy-to-renovate designs with dual floors, dual ceilings and such.

Custom-built houses offered by Mitsui Home Co., Ltd. are constructed using the two-by-four method for superior resistance to earthquakes, fire and wind, with little twists and distortions of the structure. For heightened durability, they also employ a full-base foundation that applies reinforced concrete covering the entire area under the floor, and the BS base spacer method that allows ventilation all around the foundation.
Further, after-sale services are provided to extend the life of houses, which include a 20-year warranty system for the building frame under the condition of fee-based maintenance in the tenth year.

With office buildings and retail properties, we employ recycled materials that are produced with waste materials recycled. For example, recycled crushed stone and recycled aggregate are used for the Yodoyabashi Mitsui Building. Additionally, in LaLagarden KAWAGUCHI, recycled asphalt is applied to about 80% of pavement materials for exterior pavement (parking lot, road, etc.).

Introduction of initiatives conducted by the Mitsui Fudosan Group for actual projects