Japanese nationals who were abducted by North Korea but returned to their homeland last year voiced frustration Tuesday over the government's lack of progress in effecting a reunion with the children they left behind in Pyongyang.

One of the former abductees urged Prime Minister Junichiro Koizumi to visit Pyongyang again to hold talks with North Korean leader Kim Jong Il to try and forge a breakthrough on the stalemate.

Yasushi Chimura and his wife, Fukie, spoke to reporters at their hometown -- Obama in Fukui Prefecture -- while Kaoru Hasuike and his wife, Yukiko, met the press in Kashiwazaki, Niigata Prefecture, on the eve of the first anniversary of their return from North Korea.