Abstract：The Potsdam Proclamation,achievement of the Second World War,is a key law to maintain international order and order of the Asian-Pacific region in particular. Japan attempts to resurrect the corpses of Japanese World WarⅡcriminals by way of repudiating the legally binding effect of The Potsdam Proclamation. Through study,we find out that The Potsdam Proclamation,together with the international documents including Cairo Declaration,Japanese Government's Telegram to Four States: China,United States of America,Great Britain and Soviet Union as well as Instrument of Surrender,has formed an international agreement,therefore it has legally binding effect upon the related parties,including not only China,the USA,the UK,the Soviet Union and Japan as well.

Keyword：proclamation;The Potsdam Proclamation;validity of international laws;