On June 5th 2012, Ms. Keiko Yanai who is the Senior Coordinator, Non-Proliferation, Science and Nuclear Energy Division, Disarmament, Non-Proliferation and Science Department of the Ministry of Foreign Affairs lecture on the non-proliferation politics. First, she talked about means of arms reduction and nonproliferation, and explained that they are needed for three reasons; the military security, humanitarianism and the economical development. Also, she referred to the present condition of nuclear states in the world, the general outline of NPT and rules of IAEA and Japanese policies on arms reduction and nonproliferation. Next, she talked about termination attempt on the use of CCM as a case-study for international struggle for arms reduction and nonproliferation. Then, she referred to the UN’s process on reduction and nonproliferation and noted that the diplomacy is to adjust the profits and national interests states have to promote. Finally, she argued that the cooperation with a civil society is required for nations to encourage the reduction and non proliferation. (Sayaka Yatabe)