Spy Ring Kokuryukai (1976)

Lady Karate focuses on Yoshiko's mission to persuade China's la emperor, Pu Yi to leave his comfortable existence in Tientsin and journey back to Manchuria to be the figurehead ruler of Manchukuo under the direction of the Japanese occupiers. She has ten days to finish the job or she'll be obligated to commit hara-kiri at the end of it, since she offered to do as much if she fails.