Hirotada, Prince Kachō (華頂宮博忠王, Kachō-no-miya Hirotada-ō, 26 January 1902 – 24 March 1924) of Japan, was a member of a collateral branch of the Japanese imperial family.

He entered the 49th class of the Imperial Japanese Naval Academy in 1918, graduating 1st out of 176 cadets.

In January 1922, he served for an obligatory session as a member of the House of Peers in the Diet of Japan, returning to the Imperial Japanese Navy in May of the same year as a second lieutenant.

In 1924, he was promoted to lieutenant and awarded the Grand Cordon of the Supreme Order of the Chrysanthemum.

However, to preserve the Kachō-no-miya name and to ensure that the proper familial and ancestral rites were performed, the 3rd son of Prince Fushimi Hiroyasu agreed to a reduction in status from the imperial household to the kazoku peerage, and was renamed Marquis Kachō Hironobu.