The April 2014 death by heart failure of a 27-year-old Filipino trainee in Gifu Prefecture has been recognized by the labor ministry as karoshi, or death by overwork, it was learned Monday.

Joey Tocnang came to Japan in August 2011 and worked at a casting company, cutting steel and painting chemicals onto a mold, according to the Gifu Labor Standard Inspection Office.

Before he died of heart failure in the company dorm in April 2014, he had logged up to 122.5 hours of overtime per month, in violation of labor laws, the office said.