The families of several missing people considered very likely to have been abducted to North Korea asked the government Thursday to reinvestigate their cases.

During a visit to Cabinet Secretariat adviser Kyoko Nakayama at the Cabinet Office, the families asked for a review of the 15 cases involving 16 people who went missing between 1968 and 1991.

A citizens' group considers the missing persons' cases to be likely abductions to North Korea.