Mitsubishi Heavy Industries, Ltd. (MHI) succeeded for the first time in Japan in 1990 in electric power generation with a 1 kW module of domestic SOFC using tubular type SOFC. MHI achieved continuous generation of electric power for 7000 hours using a pressurized 10 kW module in 1998. In MOLB type, MHI succeeded in generating 15 kW electric power for a total generation time of 7500 hours in 2000 using 3 pieces of 200 mm x 200 mm x 100 cells stack. Thus, the MHI SOFC is on the way to technical verification and commercialization as a power generation system. We are currently developing the atmospheric pressure 50 kW type, the MOLB type cell closest to the stage of commercialization. In the tubular type modules, development is under way for the pressurized 100 kW unit. We are also planning a micro-gas-turbine (MGT) and a hybrid system aiming at a combined cycle power system.