After Hijikata died in the Hakodate War, Yasutomi, who was by Hijikata's side when he died, wrote a notice of Hijikata's loss and asked Chikara TACHIKAWA to forward it to the Hijikata family.
箱館戦争で土方が戦死し、それを看取った安富は、土方家宛の手紙を書いて立川主税に託した。