On December 28, the Democratic Party of Japan (DPJ) announced the establishment of a DPJ Mission Statement Development Committee. The executive line-up for the committee is as follows:

Advisor: Masayuki Naoshima (Vice President)
Chair: Goshi Hosono (Secretary General)
Deputy Chairs: Tomiko Okazaki (Vice President), Masaharu Nakagawa (Acting Secretary General), Takeaki Matsumoto (Acting Chair, Policy Research Committee), Koji Matsui (Deputy Secretary General, DPJ Caucus, House of Councillors)
Director General: Junya Ogawa (Vice Secretary General)