This article explained the transition of demolition technology in Japan. The demolition work will be the process of the vacant lot, or the skill of the demolition work: (1) To demolish “safely”, (2) to minimize the damage/trouble for surrounding neighbors in regards to noise, vibration and dust, (3) with regard to the processing of demolishing materials, the most important evaluation is “to not bring the natural environment into destruction”, (4) cheap, and finally, (5) speediness of the work. Those five aspects are considered the axis of evaluation. To put it short, the goal of those involved in the demolition work is to be able to demolish the land in a clean and tidy manner without stressing everyone involved during the process.The photographs, original drawings in Japanese have been provided and permitted by Japan Demolition Contractors Association and Economic Research Association. I would like to thank both associations.This paper is an extended version of published without examination in Japanesel)1) Noboru YUASA: The Transition of Demolition Techniques for Reinforced Concrete Structure, Construction Machine, JAPAN INDUSTRIAL PUBLISHING CO., LTD., 660, Vol.56, No.2, pp.45-50, 2020.2Fig. 13 Blast demolition experiment at Takashima company house of Mitsubishi coal mine (1988)Fig. 14 Blast demolition experiment at Lakeside Building (1992)─ 40 ─Acknowledgments6. EndingDisclosureReferences
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