Japan has changed from the first time importing liquefied natural gas (LNG), and 2.0 years in the year of the month. It used as a raw material for the thermal power fuel or town gas, a small amount of greenhouse gas emissions from oil and coal. Producing countries and dispersed than oil, many advantages such as less susceptible to the influence of the unstable situation in the Middle East, has been increasing its presence as energy to support life. LNG imports of Japan's date, US Alaska laden with LNG of about ten thousand tons from the State ship Negishi factory (now Negishi LNG base, Yokohama-shi) of Tokyo Gas began to arrive to. For the first time accepted tank LNG's your active for now. City gas was made by processing the coal and oil to it, sulfur oxides which cause air pollution when burned occurs. LNG is because it does not contain sulfur, have been attracting attention as air pollution. According to the LNG importer International Group, LNG import volume of the world of 2.0 years is about billion 000 thousand tons.