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Transcripción del abstract original del autor: Liquefied natural gas (LNG) is a source of clean energy with stable, long-term supplies. LNG was first imported into Japan in 1969. Since that time, sixty-nine in-ground tanks, with a total capacity of 5,986,170 kiloliters, have been constructed in Japan for the storage of LNG. Rapid developments in the technology used to construct these in-ground tanks, including the introduction of the super-deep slurry wall method and large-scale vertical NATM, have led to ever-increasing storage capacity — rising from 10,000 kiloliters in the early days to 200,000 kiloliters today. Completely buried tanks with concrete dome roofs have been constructed, and today’s technology is such that tanks with rigid side wall to bottom connections are being constructed in large numbers for cost reduction while enhancing reliability and safety. This paper describes trends in LNG tank technology and the latest technological developments, as achieved by the author and his team in their work at Tokyo Gas Co., Ltd.