In Japan and South Korea, fact-finding research has begun to reveal the human costs and political backdrop of the North Korean repatriation program, which began in 1959. The program saw more than 90,000 Korean residents of Japan resettle in the North. Repatriates have previously described the difficult circumstances they faced there, but we now know that their lives were at the mercy of shifting policies and the flux of international affairs -- the Cold War contention between the US and the Soviet Union, as well as the changing configuration of Japan's relationship to the 2 Koreas. This documentary features former repatriates who fled North Korea at the risk of their lives. The untold of 60 years of hardship is depicted through new testimony.

Doctors at Osaka University performed the world's first transplant of heart muscle cells derived from induced pluripotent stem cells (iPS cells). It is a promising treatment for many patients with heart disease. NHK worked closely with Kyoto University which generates iPS cells and Osaka University where the transplant surgery was conducted on a long-term project to record on an 8K Ultra HD camera mounted onto a microscope. For the first time in the world, the images will reveal the entire transformation process of iPS cells which can turn into any type of cell in the body.