Japan's former Foreign Minister Seiji Maehara who is vying to become Japan's next prime minister says the country should stop building nuclear power plants, AP said. Maehara appeared to take the clearest stand against nuclear power at a news conference Saturday where five ruling party members aiming to replace Prime Minister Naoto Kan outlined their policy goals. Another top contender for the job is Economy Minister Banri Kaieda. He says he plans to decommission aging nuclear plants found to have problems during stress tests. Atomic energy is a key topic in Japan following the tsunami-spawned nuclear accident in March. The ruling Democratic party will vote Monday to select a new party chief, who will become prime minister, Japan's sixth in five years. -- SPA