Thank you for viewing. There is some age-related soiling. The continental shelf is generally defined as the boundary between the sea and land, the gently sloping part of the shallow sea. It is a treasure trove of underground resources such as oil and natural gas, as well as fisheries, and is an irreplaceable space for humanity. The continental shelf covers 5% of the Earth's land area, but around Japan, a maritime nation, the continental shelf extends to about 70% of its land area. Adding the continental shelf area of 250,000 km² to Japan's land area of 370,000 km² results in a total of 650,000 km². In other words, it can be understood how significant the use of this continental shelf is for our country. Therefore, in this issue, we have positioned continental shelf development as the new frontier of the 21st century and have put together a special feature. (Published in 1990) Contents Construction of the Underground Golden Land Shinzaburo Koshimura (Former President of Yokohama National University, deceased) Geo-Industrial City Utilizing the Underground of the Continental Shelf Original Plan: Shinzaburo Koshimura Concept: Obayashi Corporation Project Team The Continental Shelf from a Geological Perspective Noriyuki Nasu (Professor, The Open University of Japan) Underground Resources of the Continental Shelf Noriyuki Sakikawa (Professor Emeritus, Tokyo Institute of Technology) The Public Realm of the Underground Noboru Kawazoe (Architectural Critic) Japan's Continental Shelf 16 References on "Continental Shelf" Total 49P #Quarterly Obayashi #ContinentalShelf Thank you for viewing.