He was a maternal great-grandfather of Yoko Ono via his daughter Teruko, and adoptive son, Yasuda Zenzaburō (安田善三郎).

[2] Zenjirō moved to Edo at the age of 17 and began working in a money changing house.

He greatly magnified his wealth by buying up depreciated Meiji paper money that the government subsequently exchanged for gold.

[5] In his later years, he donated the Yasuda Auditorium to the Tokyo Imperial University and the Hibiya Kokaido hall.

Allegedly, Lennon, on seeing Yasuda's photograph for the first time, said "That's me in a former life", to which Ono replied "Don't say that.