Tateki TANI deeply respected Ryoma SAKAMOTO, who was also from the Tosa Domain, and it is said that when Ryoma was assassinated in 1867, he rushed to the scene first to get the detail of the assassination of Ryoma out of dying Shintaro NAKAOKA, and then he continued to hunt for Ryoma's assassin over his lifetime.
谷干城は同じ土佐藩の出身者である坂本龍馬を厚く尊敬し、慶応3年（1867年）に龍馬が暗殺されたときには、真っ先に現場に駆けつけ、瀕死の状態にあった中岡慎太郎から龍馬暗殺の経緯を聞きだし、生涯をかけて龍馬の暗殺犯を追ったという。