Before she was the only survivor of the Yantai incident, in which China sent approximately 100 North Korean refugees to die in North Korean prisons and labor camps, Yomiko Chiba was a schoolteacher in North Korea, the daughter of privileged and trusted party members who immigrated from Japan. Chiba’s loyalty was undisturbed until the day in 1995 when the people began to wander in from the countryside, emaciated and homeless, some from as far away as North Hamgyeong Province.
Soon, each morning revealed a fresh crop of dead in the streets and fields, and Chiba and her students were impressed into four squads to dispose of them. By day, they picked the dead up where they lie, covered the bodies, and hid them in a vacant building that would serve as a provisional morgue for the 35 days of their grisly, exhausting duty. By night, Chiba and her students moved the bodies to burial pits in the fields outside of town, buried them, and planted grass to conceal what lay beneath. They dared not refuse this exhausting labor, and admittedly, Chiba and her students soon stopped thinking of whether these “logs,” as she referred to them, had been men, women, or childen.

Read the rest here at OneFreeKorea's Site.
I'll be looking for the Testimony to be up on the internet. I might be able to grab it off C-Span today...