From 1 April 1941 to May 1945 Meisinger acted as Gestapo liaison connecting leaders and particular agents of the SD at the German Embassy in Tokyo.[23] His duties included seeking out enemies of the Third Reich within the German community, using various informants. He was also the SD liaison officer to the Japanese Secret Intelligence Service. One of his tasks in Japan was the observation of the secret Soviet agent Richard Sorge (who was under suspicion in Berlin) but Meisinger soon became Sorge's constant drinking companion and, unwittingly, one of Sorge's best sources of information.[24][25]