A Japanese employee of Astellas Pharma, who was sentenced to three years and six months in prison for espionage in China, is expected to be released in mid-December and return to Japan, sources said Saturday.

According to sources, final arrangements are being made to release the employee of the Japanese pharmaceutical company in his 60s on Dec. 14.

The employee was suddenly detained by Chinese authorities in March 2023, when he was about to leave China after the end of his Beijing assignment. He was indicted in August 2024.