Services & Technologies



Obayashi develops various construction-related technologies to meet the needs of its customers and society. In the civil engineering field, Obayashi has developed long-distance tunneling technologies, technologies that enable shorter construction periods, and soil remediation technologies. Obayashi has also developed time-saving technologies in the building construction field in addition to technologies that reduce costs, dampen vibration, and protect against earthquake damage.

URUP (Ultra Rapid Under Pass) Method

The URUP (Ultra Rapid Under Pass) Method Enables Shorter Construction Times for Road and Railroad Underpasses

Tunnel in the Metropolitan Expressway Central Circular Shinagawa Route

The URUP method developed and implemented by Obayashi is the world's first tunneling technology that uses a shield machine to tunnel underground through the entire length of the tunnel from entrance to exit. It enables rapid construction of road and railway underpasses.
In comparison with conventional construction methods, the URUP method shortens the construction period by roughly two-thirds by eliminating the need for open-cut excavation and vertical shafts. It also substantially alleviates traffic congestion and noise associated with the construction work. It should contribute to reducing CO2 emissions as well.

Comparison with conventional construction method

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"Laputa 2D" Super-Active Vibration Control Technology

World's First Earthquake-Proof Building "Laputa 2D" Super-Active Vibration Control Technology

Obayashi has developed "Laputa 2D," the world's first super-active vibration control technology that can buffer seismic forces to reduce building tremors to one-fiftieth the magnitude of ground tremors. A rubber base and actuator are installed beneath the building. When an earthquake occurs, sensors installed in the building and in the ground detect and analyze the seismic motion to determine the optimal compensatory force, whereupon the actuator rocks the building in a manner that negates the seismic tremors. The first building fitted with the new technology was the Obayashi Technical Research Institute's new main building, which was completed in 2010.

"Laputa 2D" Super-Active Vibration Control Technology

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"Eco-Navi" Optimal Combination of Energy Conservation Methods

Energy conservation initiatives can generate a bigger impact by combining several techniques, but analysis of such combinations normally takes a great deal of time. Eco-Navi analyzes in a short period of time the combination of energy-saving techniques from among Obayashi's abundant choices that can offer the largest energy savings at low cost. The effects can be visually confirmed on a PC, enabling proposals suited to customer needs to be made.

Eco-Navi Proposes an Optimal Combination of Energy Conservation Methods "Laputa 2D" Super-Active Vibration Control Technology

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Technical Resaerch Institute

Obayashi develops a wide range of construction technology with the aim of meeting the needs of society and its customers.

Main Building of Obayashi Technical Research Institute to Reduce CO2 Emissions by 55%

Techno-station, Obayashi's main technical research building

The new main building of the Obayashi Technical Research Institute, Techno-station, was completed in September 2010, concentrating all of the Company's environmental technologies. CO2 emissions will be reduced by 55% through aggressive use of natural energy and utilization of next-generation facilities.
Moreover, Obayashi will use some of the money saved in lighting and heating costs due to energy conservation to purchase carbon credits equivalent to the remaining 45%, thereby effectively offsetting total CO2 emissions. The Techno-station will be the first Japanese research facility to achieve this carbon-neutral status.

Facilities for Research and Experiments Matching Wide-Ranging Needs

A new multipurpose laboratory was also completed along with Techno-station. This new laboratory is equipped with multipurpose laboratory spaces for conducting a wide range of experiments, as well as a large-scale shaking table capable of replicating the dynamic ground movement in an earthquake that causes such phenomenon as ground liquefaction.

At the same time, Obayashi converted the former main building of its research institute into a materials and chemical engineering laboratory. The building is now being used for research and development of land and water purification technologies for protecting and regenerating the environment, and developing safe and high-quality construction methods optimizing the characteristics of various building materials.

The new multipurpose laboratory facility

Materials and chemical engineering laboratory

Since its founding in 1965, the Obayashi Technical Research Institute has been home to many cutting-edge facilities, including one of the largest tri-axial shaking tables in Japan, a world-class geotechnical centrifuge system, and Japan's most advanced fire protection engineering laboratory.
The institution not only promotes research and development of technologies for improving safety and peace of mind but also technologies for reducing the environmental impact and completion time of construction.

Tri-axial shaking table for developing anti-seismic technologies

Geotechnical centrifuge system

Fire protection engineering laboratory

Multipurpose wind tunnel

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