Although Iwakura politically cooperated with Hirobumi ITO, he strongly rejected Ito and Takayoshi KIDO's ideas on kazoku, such as increasing the members of the kazoku class (specifically, by giving the title to persons who had contributed to the Meiji Restoration) to form an upper chamber in the future and allowing more kazoku's participation in politics.
岩倉は政治的には伊藤博文と協力関係にあったが、伊藤や木戸孝允が構想した将来の上院形成のための華族増員（具体的には維新の功労者を華族を加える）と華族の政治参加には強い拒否反応を示した。