Although his brother Masahiro attempted to take a chance and become successful in Shoei Makino Cinema, he lost everything from the fire of the Omuro Movie Studio in 1932, and joined Nikkatsu Corporation with other people from the Makino families.
正映マキノキネマで巻き返そうとした兄・正博は1932年（昭和7年）御室撮影所の焼失で全てを失い、マキノ一党を率いて日活に入社した。