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.

A 10-year-old Japanese student has died one day after he was stabbed near his school in southern China. The boy, who was enrolled at the Shenzhen Japanese School, succumbed to his injuries early on Thursday, Japanese officials said. His assailant, a 44-year-old man surnamed Zhong, was arrested on the spot, local police said.