Frustration and desperation are growing in Japan amid a search for an 11-year-old boy who disappeared more than two weeks ago in a rural part of Kyoto prefecture, with 700 police officers scouring abandoned properties in the mountains surrounding the town of Nantan. The lack of sightings and clues has triggered speculation – a good deal of it sensationalist – on the boy’s fate and focused renewed attention on the number of children who go missing every year in Japan. The father of Yuki Adachi...