Yoshida Tôyô was a Tosa han retainer, and for a time lord of Tosa Yamauchi Yôdô’s most trusted and reformed-minded minister. Assigned in 1853 to help oversee reforms in domain governance at the domain's Edo mansion, he had a notable influence on other upcoming Tosa leaders such as Gôtô Shôjirô and Itagaki Taisuke. On or around 1854/6/11, however, he was recalled from Edo, had his stipend reduced, and was sentenced to house confinement for a time.
- Hillsborough, Romulus. RYOMA- Life of a Renaissance Samurai. Ridgeback Press, 1999
- Jansen, Marius B. Sakamoto Ryoma and the Meiji Restoration. Columbia University Press, 1994.
- Ishin Shiryô Kôyô 維新史料綱要, vol 1 (1937), 612.
- Ishin Shiryô Kôyô 維新史料綱要, vol 4 (1937), 42.