CRIEPI initiated the Ogachi project in the northern part of Japan in 1986, to determine the feasibility of an HDR geothermal power plant based on a multi-layer reservoir. During the past eleven years technologies have been developed for surveying underground resources, forming multi-layer reservoirs and evaluating these reservoirs in a 1.4 billion yen study. Future plans include the development of a lifespan evaluation method, the improvement of production rates and finally, the establishment of an actual HDR power plant.