A massive sinkhole near Tokyo that swallowed a truck and its driver a week ago, and has filled with sewage and debris, highlights the risk posed by Japan's ageing pipes.
Emergency workers have been striving in vain to reach the 74-year-old man, who rescuers have had no contact with for a week, and who was likely buried under sediment and sewage water in the sinkhole in the city of Yashio.
