In 1858, the Ansei Purge began under the leadership of Ii Naosuke, targeting opponents of the shogunate. Gessho, aligned with the Hitotsubashi faction, became a wanted man.
Saigo and others sheltered him, but the Satsuma Domain disliked protecting Gessho and ordered his exile to Hyuga, effectively a death sentence.
Understanding what that meant, the two prepared to die and threw themselves into the sea.
Gessho died, but Saigo survived. To hide, he was exiled to Amami Oshima and took the alias Gengo Kikuchi.
Later, through Okubo’s maneuvering, he returned to Satsuma, only to anger Shimazu Hisamitsu, the domain’s power holder. Saigo was exiled again, to Tokunoshima and then Okinoerabu Island.
Meanwhile, Japan grew increasingly tense as major incidents unfolded.
In 1862, the Namamugi Incident, in which a Satsuma samurai killed a British man, led to the following year’s Anglo-Satsuma War as Britain retaliated.
Relations with the Choshu Domain also worsened after the August 18 Coup, when pro-imperial factions including Satsuma forced the Sonno Joi faction out of Kyoto.
As Hisamitsu hit a dead end and Satsuma struggled with a shortage of capable leaders, Saigo was pardoned to meet the domain’s needs.
About a year and a half after his return, he was appointed “Gunpu-yaku” and “Shuhan Ossetsu-gakari” (commander-in-chief and diplomatic liaison), becoming a senior retainer of the Satsuma Domain.