Frustration is growing in Japan as police continue searching the mountains of Kyoto for a boy who disappeared two weeks ago. The lack of sightings has fueled speculation about the boy's fate and renewed focus on missing children cases nationwide.

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...