抄録
Nittetsu Kagoshima Geothermal Co., Ltd. is supplying geothermal steam for the Ogiri Power Plant, which commenced commercial operation on 1st March 1996. The utilization factor of the plant reaches up to 95.6% through 2 years and 5 months from the beginning of commercial operation and there has been non stop-page of operation caused by the steam supply facilities. It took about 17 years from the beginning of Kirishima geothermal development survey to the commercial operation. This Paper reports the progress of the development, reservoir evaluation, construction and the steam production activities. Future prospect, 2nd stage planning will also be described.