Iwakura Mission
Also called: Iwakura Embassy
Half of the Meiji leadership spent a year and nine months in the United States and Europe, sounding out revision of the unequal treaties and studying Western institutions and industry.

Unknown author · Public domain · Source
In December 1871 about a hundred people — ambassador Iwakura Tomomi, core leaders such as Kido Takayoshi, Ōkubo Toshimichi and Itō Hirobumi, and students — sailed from Yokohama. Rebuffed in America when they raised treaty revision, they turned to studying parliaments, factories and schools in Britain, France, Germany, Russia and elsewhere. Returning in September 1873 and insisting that national strength come first, they overturned the caretaker government’s decision (backed by Saigō Takamori and Itagaki Taisuke) to send a mission to Korea, and Saigō and Itagaki left the government. Korea’s 1881 inspection mission to Japan was a study tour of the same kind.