The main opposition Constitutional Democratic Party of Japan (CDP) on Wednesday proposed to opposition peer Democratic Party for the People (DPP) that the nongovernment camp back DPP head Yuichiro Tamaki as a unified candidate to succeed outgoing Prime Minister Shigeru Ishiba. CDP Secretary-General Jun Azumi conveyed the proposal to his counterpart from the DPP, Kazuya Shinba, during the day's meeting to discuss responses to the prime minister nomination election planned to be held at the