Is a Muslim Sunni extremist armed groups [Islamic State] (IS) (hereinafter, referred to as [Islamic State]) is, what can be regarded as the [national] of international law. It is necessary to a certain established requirements in order to say that it is on the international law [country]. First of all, when discussing the state of the established requirements of international law, that is cited in many textbooks and papers, [Montevideo Convention on the state of rights and obligations] of the year is the first condition. The Article, as the country that requirement as personality on [international law, including: (a) permanent residents, (b) distinct regions, (c) Government, and (d) other countries with the ability to tie up the relationship It is defined as there must be]. Textbook of international law in many of Japan, the one of the requirements] of this (a) from (d), are the general requirements that are acceptable to the nations. Incidentally, a part of the national area in the context of the new state is established such as by spun for entity to become a [State] national approval is performed by the existing national.