1830 – Born on the 10th of August in Kagoshima, Satsuma Province.
1846 – He was given the position of aide to the domain’s achivist.
1858 – He was appointed the position of tax administrator.
1866 – He met with Saigo Takamori and Choshu domain’s Kido Takayoshi, to form the secret Satcho Alliance to overthrow the Tokugawa.
1871 – He worked to secure revision of the Unequal Treaties and joined the Iwakura Mission on its around-the-world trip.
1873 – He returned to Japan to prevent an invasion of Korea (Seikanron).
1875 – He participated in the Osaka Conference in an attempt to bring about a reconciliation with the other members of the Meiji Oligarchy.
1878 – He was one of the most influential leaders of the Meiji Restoration and the establishment of modern governmental structures.
– He died on the 14th of May.