IKorea Optical High Tech, a Japanese-invested company in Gumi, Gyeongbuk, closed its factory after a fire in 2022 and relocated production to its Pyeongtaek site, dismissing 17 workers who refused voluntary retirement. The company, a subsidiary of Japan’s Nitto Denko Group, has faced allegations of unfair dismissal and union-busting, including reportedly cutting off water and attempting to forcibly evict protesting workers occupying the site. The union demanded employment succession and protection for domestic workers in the context of foreign investment. The rooftop protest ended after 600 days, following a government and ruling party pledge to initiate labour-management negotiations and consider new regulations on foreign-invested enterprises.