There is no provision for emergency powers in the constitution of Japan. There are various discussions on that matter, and I take up the problem on the enactment of emergency powers. This essay consists of following. (1) Introduction. (2) Conditions and types. (3) Necessity of the enactment : whether or not it should be provided in the constitution. (4) Course of enactment : what provisions we lay down. (5) Conculusion : I think that it is necessary to provide for the comprehensive emergency powers in the constitution.