Prime Minister Junichiro Koizumi must achieve concrete results when he meets North Korean leader Kim Jong Il on May 22 in Pyonygang, relatives of Japanese abducted to North Korea, and others working on their behalf, demanded Friday.

Simply securing the release of eight family members of the five Japanese abductees who were repatriated two years ago is not enough, they said, noting Tokyo is still demanding information from Pyongyang on 10 others officially recognized as having been abducted.

Pyongyang admitted during Koizumi's historic October 2002 summit in the North to abducting eight of the 10 and claimed they died, and also denied that the other two ever entered its territory. It allowed the five survivors to return to Japan, but didn't let their offspring, and the American husband of one of the five, accompany them.