 Ramba uchiverenga ndima ino - Kufanana nevamwe vakuru vakuru vakawanda muKyoto, Iwakura akaramba zvirongwa zveTokugawa shogunate zvokupedza mutemo wokuzvitsaura kwenyika yeJapan uye kuzarura Japan kune dzimwe nyika. Apo Hotta Masayoshi, Rōjū wehurumende yeTokugawa akauya kuKyoto kuti awane mvumo yeumambo yekusaina Chibvumirano cheFriendship uye Commerce United States Japan muna 1858, Iwakura akaunganidza vatongi vaipikisa chibvumirano uye vakaedza kukanganisa nhaurirano pakati peShogun neDare. Dare ramambo nehurumende yechiShogunate zvaipesana pamusana peChibvumirano Choushamwari neKutengeserana. Hurumende yechiShogunate yakabvuma kusaina chibvumirano chacho, asi vanenge vanhu vose vomudare ramambo vaiva nepfungwa yakasiyana. Zvisinei, Kujō Hisatada, chiremera cheimba youmambo, akatsigira pfungwa yechigaro. Iwakura aida kudzivisa chibvumirano cheFriendship and Commerce, naizvozvo akasarudza kushandisa mutoo usina kujairika. Zvikurukuru, akaronga kuva nehurukuro yakananga neKanpaku nokutungamirira vanhu vazhinji vanokudzwa. Somugumisiro weizvi, Kanpaku akabvuma kudzivisa kusaina chibvumirano. Ichi chinoitika chinonzi kuratidzira kwavatariri makumi masere navasere veDare roUmambo, uye chakaita kuti Iwakura ave nomukurumbira. Mazuva maviri chiitiko chacho chaitika, Iwakura akanyora mashoko ezvematongerwe enyika. Kwakataurwa kuti aida kuverengera kusaina chibvumirano chacho nokuti aifunga kuti Japan yaifanira kudzidza pamusoro pemamiriro ezvinhu netsika dzenyika dzokumwe. Uyewo, akasimbisa kubvumirana kwevanhu vomunyika yacho mumashoko akanyorwa. Muna 1858, Ii Naosuke akava Tairō ndokusayina Chibvumirano cheShamwari neZvokutengeserana pasina kubvunza mambo Kōmei. Izvi zvakatsamwisa mambo, uye ukama hwaiva pakati pemhuri youmambo nehurumende yechiShogunate hwakawedzera kuipa. Iwakura akaita nhamburiko yokuwana nzira yokugadzikana nayo norugare. 