In 1970 Japanese mountaineers conducted a major expedition. The centerpiece was a large "siege"-style expedition led by Saburo Matsukata, working on finding a new route up the southwest face. Another element of the expedition was an attempt to ski Mount Everest. Despite a staff of over one hundred people and a decade of planning work, the expedition suffered eight deaths and failed to summit via the planned routes. However, Japanese expeditions did enjoy some successes. For example, Yuichiro Miura became the first man to ski down Everest from the South Col (he descended nearly 4,200 vertical feet from the South Col before falling with extreme injuries). Another success was an expedition that put four on the summit via the South Col route. Miura's exploits became the subject of film, and he went on to become the oldest person to summit Mount Everest in 2003 at age 70 and again in 2013 at the age of 80.