Japan's ambassador to Beijing has asked for more security for Japanese nationals in China after a 10-year-old Japanese boy was killed this week in a knife attack that was the second to target school students.

Japan’s prime minister has demanded an explanation from Beijing over the fatal stabbing of a schoolboy in the second knife attack on Japanese children in China in recent months. The 10-year-old boy was stabbed by a man on his way to class Wednesday about 200 meters (650 feet) from the gates of the Japanese school in the southern city of Shenzhen,

HONG KONG—A 10-year-old Japanese boy who was stabbed on his way to school in southern China died Thursday, after the second such attack in months amid a social-media campaign that has stirred up anti-Japan sentiment in the country. The stabbing took ...