The step-mother, Sada, whom Fumimaro did not get along with, died from malnutrition after evacuating alone to their alternate residence in Kyoto (where the Yomei Bunko Library is currently located) during the war.
不仲だった継母の貞は戦時中京都の別邸（現・陽明文庫所在地）に単独で疎開、そこで栄養失調により死去。