In [[1846]], he was named heir apparent to the Ii household, and four years later, at the age of 36, Naosuke became head of the Ii family and lord of [[Hikone han]]. He was named Tairô on [[1858]]/4/23,<ref>Ishin Shiryô Kôyô 維新史料綱要, vol 2 (1937), 549.</ref> and was a strong supporter of [[Hotta Masayoshi|Hotta Masayoshi's]] having negotiated and agreed to the Treaty of Amity and Commerce ([[Harris Treaty]]). | In [[1846]], he was named heir apparent to the Ii household, and four years later, at the age of 36, Naosuke became head of the Ii family and lord of [[Hikone han]]. He was named Tairô on [[1858]]/4/23,<ref>Ishin Shiryô Kôyô 維新史料綱要, vol 2 (1937), 549.</ref> and was a strong supporter of [[Hotta Masayoshi|Hotta Masayoshi's]] having negotiated and agreed to the Treaty of Amity and Commerce ([[Harris Treaty]]). |