Japan’s main opposition party head signals openness to unite on PM vote

Tamaki, however, has cited differences with the CDPJ on security and energy as major obstacles to coordination. Noda, a former prime minister, and Tamaki formerly belonged to the same party but later diverged.
Noda said that if Tamaki aims to become prime minister the "ability to unify others is essential" and avoiding efforts to find common ground is "not a responsible attitude," in a warning to his former colleague whose party has gained traction in recent elections.