Japan's first full-fledged practical geothermal generation started in 1966 at the Matsukawa geothermal power plant in Matsuo Village, Iwate Prefecture. Currently, there are 19 geothermal plants in operation, mostly in the Tohoku region and the Kyushu region, with a combined capacity of over 530,000 kilowatts, or 0.2 percent of total power generated in Japan. Thus, geothermal power has entered into a full-fledged introductory phase in Japan.

Together with hydropower, geothermal power constitutes a valuable renewable energy resource that is affordable in volcanic Japan. It is clean energy, since only one twentieth the amount of carbon dioxide is emitted per unit power generation compared to thermal generation. Also, a stable supply of electricity day and night all through the year is secured. Thus, the government has stated that geothermal power development should be actively promoted.

In addition, geothermal energy can be used for many other purposes such as bathing, greenhouse gardening, and melting snow on roads. Municipalities having geothermal plants utilize its versatility for their regional development needs.

However, many problems hamper its development. Sites that are suitable for constructing geothermal plants are often in areas designated as national parks, and construction within these areas is strictly regulated to protect the environment. In addition, the generating capacity of a single plant is still small, 20,000 to 30,000 kilowatts, and costs are high.



Posted: 2003/11/13 06:11:28 AM
Japanese version

TAG Ecosystem , Energy , Global warming , Government