US President George W Bush said Thursday that he and visiting Japanese Prime Minister Junichiro Koizumi agreed that a missile launch by North Korea would be "unacceptable."   

"We both agree that it's very important for us to remain united in extending a clear message to the North Korean leader that launching the missile is unacceptable," Bush said during a joint public appearance at the White House.   

The president also said that he and the prime minister had discussed abductions of Japanese citizens by North Korea and expressed "deep concern" about the human rights situation in the hermetic country.