Toshimichi Takatsukasa (?? ??, Takatsukasa Toshimichi, 26 August 1923 – 27 January 1966), son of Duke Nobusuke, was a Japanese researcher of trains.
He was a descendant of Tokugawa Yoshinao and consequently was born into an aristocratic family, but, like all Japanese aristocrats, lost his title with the post-war legal reforms of 1947.
He worked at TEI Park, a railroad museum in Tokyo.
He married the third daughter of Emperor Hirohito, Princess Kazuko; they adopted a son from Ogyu-Matsudaira, Naotake.
On 28 January 1966, Toshimichi Takatsukasa was found dead of carbon monoxide poisoning at the apartment of his mistress, Michiko Maeda, a Ginza nightclub hostess, who also died of the same cause.
While the official cause of death was attributed to a faulty heater, there was widespread speculation in the Japanese press that it was really a double suicide, caused by his inability to divorce and marry the woman he loved.