Relatives of two people who disappeared in the 1960s and '70s urged the government Monday to officially recognize them as having been abducted to North Korea.

On Sunday, it was learned that Hiroshi Saito and Kyoko Matsumoto may be in a photo that belonged to a man who fled to South Korea from North Korea last year.

"It is a very solid piece of information," Chief Cabinet Secretary Hiroyuki Hosoda said Monday as he discussed the latest finding.