Mitsuhirato Mitsuhirato ( on the left ) in a Chinese translation Mitsuhirato is a character from The Adventures of Tintin series of classic comic books drawn and written by Hergé . He is a sadistic Japanese double agent who appears in The Blue Lotus . He owns a women 's clothing shop in the big , quiet street ( direct Danish translation ) in Shanghai , but is also involved in a drug trafficking cabale with Rastapopoulos and is also working for the Japanese government . Mitsuhirato is , along with the other Japanese principal characters , characterized as an evil , scheming person , exploiting political turmoil in China to his and his country 's advantage . He is also a Japanese government agent , and as witnessed by Tintin , a prominent agent in the Mukden Incident , as the events are portrayed in the The Blue Lotus . Mitsuhirato attempts several covert assassinations of Tintin , and finally tries to turn Tintin insane by injecting him with the fictional `` Rajaijah '' juice , which induces madness ( see Cigars of the Pharaoh ) . After this fails , he tries to kill Tintin with his knife , then discovers that is has been substituted with a tin knife and the poison replaced by water , by order of Wang Yen-Chi . After his plots are ultimately foiled , he commits hara-kiri . The Adventures of Tintin Creation of Tintin · Books , films , and media · Ideology of Tintin Characters : Supporting · Minor · Complete list Miscellany : Hergé · Marlinspike · Captain Haddock 's exclamations Categories : Tintin characters | Fictional secret agents and spies | Fictional Japanese In other languages : Français | Svenska 