Abstract:Quantum science and technology has a wide range of applications in the Internet of Things, artificial intelligence, health care and autonomous driving, and has played an important role in promoting high-quality development and safeguarding national security. This paper introduces the current research status of quantum science and technology in Japan, outlines national quantum science and technology strategies and policy documents through reports published regularly by the KIDSASHI platform of the Science and Technology Forecasting Centre of the Japan Science and Technology Policy Institute, and analyses the future development trends and application prospects of quantum science and technology in Japan from five aspects, including the importance of each topic, international competitiveness, prospects for scientific and technological realization, prospects for social realization, and policy measures, based on the results of the 11th Delphi survey on technology foresight in Japan. According to the data from the JSTPI Delphi survey results, the average time to achieve the 702 topics in this survey is 2032, and all 22 topics of quantum science and technology will achieve their social goals between 2032 and 2040; Japan will build the country's first gated quantum computer in 2035; single spin elements, quantum sensors and quantum relays are rated high in terms of importance and international competitiveness.