 On December, 13, 1931, the OGPU decoded and forwarded to Stalin a conversation between Kasahara and his superior visiting Moscow, which advocating for war before the USSR became too strong and underscoring that “the countries on the Soviet western border (i.e., at a minimum Poland and Romania) are in a position to act with us.The thinking of Japanese ambassador to USSR, Hiroki Kota,“the cardinal objective of this war must lay not so much in protecting Japan from Communism as in seizing the Soviet Far East and Eastern Siberia” was also mentioned that.On his return to Japan, he was assigned to the Soviet Branch of the 4th Section (European & American Military Intelligence), 2nd Bureau, of the Imperial Japanese Army General Staff.