赤い広場ー霞ヶ関 p.104-105 On behalf of the Soviet’s spy pilot who had to withdraw after the peace treaty came into force, they were trying to set up a Japanese spy pilot who would take over the work.
赤い広場ー霞ヶ関 p.132-133 Investigator officials leaked, “We are no longer interested in MVD(Ministry of Internal Affairs) spies. Now we are investigating the actual situation of the 4th section of the Red Army”.