The First Chà Âshà « expedition () was a punitive military expedition by the Tokugawa shogunate against the Chà Âshà « Domain in SeptemberâÂÂNovember 1864. The expedition was in retaliation for Chà Âshà «'s role in the attack on the Kyoto Imperial Palace during the Kinmon incident in August 1864. The expedition ended in a nominal victory for the shogunate after a deal negotiated by Saigà  Takamori allowed Chà Âshà « to hand over the ringleaders of the Kinmon incident.
The First Chà Âshà « expedition was launched on 1 September 1864.
The conflict finally led to a compromise brokered by the Satsuma Domain at the end of 1864. Although Satsuma initially jumped on the opportunity to weaken its traditional Chà Âshà « enemy, it soon realized that the intention of the Bakufu was first to neutralize Chà Âshà «, and then to neutralize Satsuma. For this reason, Saigà  Takamori, who was one of the Commanders of the shogunate forces, proposed to avoid fighting and instead obtain the leaders responsible for the Kinmon incident. Chà Âshà « was relieved to accept, as were the shogunate forces, who were not much interested in battle. Thus ended the First Chà Âshà « expedition without a fight, as a nominal victory for the Bakufu.