He cultivated an association with the daughter of an important government official who guided him to Chongqing; this private diplomacy was discovered by the Kempeitai, and he was then recalled to Japan because this was seen by the cabinet as a problem.The woman he had made an acquaintance with was a Chinese spy - there is also a theory that he was ordered to return home for fear that he would leak confidential information to Zheng Pingru.