This paper examines the common understanding of the word ‘terrorism’ in the modern Japan. The paper begins with interpretation of several films which help us to understand the visibility of discourses on terrorism, followed by the third section that problematizes recent inflationary phenomenon of the use of the word ‘terrorism’ in Japan. Then, the fourth section analyzes Tsuneki Kurushima’s discourses on terrorism as an exemplar case of Japanese terrorism before the Second World War. The fifth section scrutinizes the discourses of East Asia Anti-Japan Armed Front “Wolf” as an exemplar case of terrorism in the post-war period. The sixth and seventh sections discuss continuities and discontinuities of these two discourses in the contemporary Japanese society, in order to illuminate the relevance to terrorism in the twenty-first century. The concluding section wraps up the discussion, reflecting on JMG Le Clézio’s remarks on the terrorist attack in Paris, France on 11 January 2015.