Wind turbines are widely used to generate electricity commercially. Output per turbine generator tends to increase over time, with 500 kW to 600 kW wind turbines most widely used overseas. Mitsubishi has developed the MWT-1000, first installed in Muroran. This new turbine features (1) a strong, large, light 26.8 m blade; (２) a very low noise level of 99 dBA using new blade noise reduction and isolated gear and generator mounting; and (３) confirmed excellent efficiency and reliability based on data from operation and evaluation tests for the Muroran unit.