Tokyo (CNN) -- As diplomats in Beijing discuss reopening the investigation into a string of unsolved kidnappings of Japanese citizens by North Korea, the families of those abducted anxiously wait and hope. For years, they've been seeking answers in the mysterious disappearance of their loved ones. The bulk of the abductions took place nearly four decades ago and the families of those taken have endured the agony of uncertainty, never knowing what truly transpired. With talks between Tokyo and Pyongyang that took place on Tuesday in the Chinese capital, those left behind to wonder what happened to their disappeared relatives are hopeful that they will finally get some answers.
@highlight
North Korea accused of dozens of abductions of Japanese citizens during the 1970's and 80's
@highlight
Renewed bilateral talks raise hopes for family members
@highlight
Brother and son of Yaeko Taguchi, who disappeared in 1978, look for answers
It was later revealed that North Korean agents abducted @placeholder and took her to North Korea by boat.
He believes his mother is still alive and is hopeful renewed talks in @placeholder between Japan and North Korea could bring answers about his mother.
But he fears the North Koreans won't be truthful and won't allow his mother to leave, because she knows too much about the secret training of @placeholder spies.
CNN has contacted @placeholder embassies and missions in nine countries, but has never received responses to inquiries.