Guo was also friends with Japanese resistance fighters Kaji Wataru, and his wife Yuki Ikeda, who he would take inland from Hong Kong to engage in anti-Japanese psychological warfare during the Second Sino-Japanese War.
Uchiyama also supported Kaji's ex-wife, a proletarian musician named Sakura Kono, and his second wife, Yuki Ikeda, who Kaji remarried soon after he escaped Shanghai.
Yuki Kajiura | Kaori Yuki | Ikeda | Daisaku Ikeda | Yuki Maki | Yuki Ito | Yuki Ikeda | Yuki | Masami Yuki | Mamiko Ikeda | Kikunae Ikeda | Ikeda clan | Atsuko Ikeda | Yuki Urushibara | Yuki Masuda | Yuki Maeda | Yuki Kure | Yuki Koyanagi | Yuki Kiriga | Yuki Kawauchi | Tsuyoshi Ikeda | Nobuteru Yūki | Kyōsuke Ikeda | Ikeda, Osaka | Ikeda Nagaoki | Hayato Ikeda | Chushingura: Hana no Maki, Yuki no Maki | BS Tantei Club: Yuki ni Kieta Kako |
Kaji, along with Yuki Ikeda, and another Japanese named Kazuo Aoyama, were involved with the re-education of captured Japanese soldiers, and psychological warfare against the Empire of Japan for the Kuomintang which was conducted by the Japanese People's Anti-war Alliance.