A court on Tuesday sentenced a 28-year-old man to 14 years and six months in prison for stabbing a pop idol more than 20 times in revenge for her spurning his gifts and social media messages.

Tomohiro Iwazaki was charged with the attempted murder of Mayu Tomita, a 21-year-old university student and singer-songwriter.

Iwazaki pleaded guilty last week to stabbing Tomita last May during a hearing at the Tachikawa branch of the Tokyo District Court.