Born in Tosa (now Kochi), Nakaoka, together with Sakamoto Ryoma
contributed to the anti-Tokugawa movement. His major effort was the mediation
between the domains Satsuma
, which led to the Satsuma-Choshu alliance of 1866 and Satsuma support
for Choshu in its fights against a Tokugawa punitive expedition.
Before the fall of the Tokugawa Bakufu, Sakamoto and Nakaoka were murdered
by secret police units of the Tokugawa Bakufu in Kyoto.
Nakaoka is buried in Gokoku Shrine
in Kyoto, next to Sakamoto.
Statue of Sakamoto Ryoma and Nakaoka Shintaro in Kyoto
Nakaoka Shintaro, 1838-1867