Santo Co.,Ltd. authorizes a Buyback Plan.

Santo Corp is mainly engaged in construction contract business. The Company operates in three business segments. The Civil Engineering segment engages in general civil engineering, paving and underground works. The general civil engineering works include general civil engineering work such as mountain and flood control and others. The paving works include land and road paving work, and special greening related to bedrock. The underground works consist of ground improvement, continuous underground wall construction, high-precision small-diameter pipe propulsion and others. The Construction segment engages in construction of offices, government buildings, accommodation facilities, stores, factories, schools and hospitals, and rental and condominium construction work. The Environmental Development segment involves planning, investigation, design, supervision, construction and operation related to environment, buying and selling, leasing, brokering, managing, and appraising real estate.