He was hired through a dispatch agency in October 2020 to work at the freight department of a factory in Kyoto prefecture, the agency reported, citing an unnamed " former senior colleague" .

共同社援引一位不愿透露姓名的“前高级同事”的话，山上于2020年10月通过一家派遣机构受雇于京都县一家工厂的货运部门。