In September 1955, the office of the director of the Shanghai Municipal Public Security Bureau received a whistle-blowing letter. The letter revealed that his friend's relative, You Zhiyuan, was Japanese. His real name is Yoshiharu Fukaya. Disguised as a Chinese during the war, he traveled to Beiping, Jinan, Shanghai and other places to carry out espionage activities. Kill patriots and make counterfeit money with others. After liberation, he lived in Shanghai, mainly selling second-hand electrical appliances and hiding for a long time.
The first thing to confirm in this case is whether this Yu Zhiyuan is Japanese, a Japanese gendarmerie officer, a spy or a Japanese spy who is still lurking. The Shanghai Municipal Public Security Bureau began a detailed investigation. The reconnaissance direction is divided into two steps.
1. Investigate the historical background, work and social scope of his wife Chen Qixia.
2. Monitor You Zhiyuan's actions throughout the process.
Soon, major breakthroughs were made in both reconnaissance directions. They confirmed that Yu Zhiyuan was a former Japanese gendarme posing as Chinese. He was also a Japanese gendarmerie agent.
Now that the case is even deeper, it is necessary to find out whether the 'Yoshiharu Fukitani' on the whistleblower letter is the same person as the current Shanghai household registration 'You Zhiyuan', and if the former Japanese gendarmerie has committed a blood debt to the Chinese people, what is the purpose of the current lurking?
Shanghai Municipal Political Security Office went to Shandong for external investigation. With the assistance of the Jinan Municipal Public Security Bureau, the scouts overcame the incomplete Japanese and fake archives. They scrutinized the list of members of the Japanese gendarmerie who had been found. After a series of investigations and the careful identification of He Chengda and Jia Yili, translators of the former Jinan Rikou Gendarmerie Special Agent Class, it was determined that You Zhiyuan was a member of the Jinan Gendarmerie Team, Yoshiharu Fukaya.
He Chengda also said: Yoshiharu Fukaya sometimes goes to Shanghai to do "trading." His activities were directly led by the Japanese army Kasai Shou (then gendarmerie brigade leader, with the rank of lieutenant), in direct contact with the staff officer (intelligence) Yamada Shosa of the Japanese Twelfth Army.
In Jinan, the scouts also found Zhang Mou, a person who had opened a Yameng sock factory with You Zhiyuan. He recalled that the so-called "Yamun Sock Factory" opened in 1942 and was responsible for "reforming" the prisoners of the Eighth Route Army transferred from the Japanese "National Salvation Training Center". Conditionally handed over to the Japanese spy agency in Jinan for use, if it cannot be reformed, it will be executed secretly.
In order to verify the situation of counterfeit banknotes, Li Weigong, director of the printing plant of Beihai Bank, confirmed that in 1940, Japan did counterfeit five-pointed, one-dollar, five-dollar, and ten-yuan Beihai coins.
Fan Songnian, a person familiar with the matter, said that in 1940, You Zhiyuan changed his name to Niu Zhenye and went from Jinan to Shanghai, and together with Li Jiawu, a member of the "China-Japan Youth Alliance," he printed counterfeit money on the grounds that the anti-Japanese guerrillas needed to print counterfeit money. After returning to Jinan, You Zhiyuan secretly instructed the gendarmes to arrest Li Jiawu and kill him.