Abstract: In recent years, cases of overseas Japanese being kidnapped and killed by extremist terrorist organizations have occurred frequently, and overseas Japanese and Japanese companies investing overseas are facing a severe security test. To this end , the Japanese government has to seriously deal with the harassment of terrorism and increase the intensity of international counterterrorism cooperation. At present, Japan focuses on multilateral, regional and bilateral aspects of international antiterrorism cooperation. Japan vigorously carries out international antiterrorism cooperation, with its deep-seated purposes, mainly including finding legitimate reasons for amending the Constitution at home and sending troops overseas; taking the opportunity to expand Japans marine geopolitical influence; ensuring Japans energ security; and providing security guarantees for the successful hosting of the Tokyo Olympic Games in 2020. Japans international antiterrorism cooperation inevitably has its limitations due to its serious “closeness to the United States”. Japan does not have its own counterterrorism strategy, and will face more and more serious counterterrorism problems and challenges in the future.

Key words: terrorism, “Islamic State” organization, Middle East region, international counterterrorism cooperation, collective selfdefense rights