"元皇族の北白川道久氏死去" [Former Imperial Family Member Michihisa Kitashirakawa Has Died]. Jiji Press (in Japanese). 22 October 2018. Archived from the original on 22 October 2018. Retrieved 16 February 2020.
"元皇族の北白川道久氏死去" [Former Imperial Family Member Michihisa Kitashirakawa Has Died]. Jiji Press (in Japanese). 22 October 2018. Archived from the original on 22 October 2018. Retrieved 16 February 2020.