The rulings come about a month after the top court upheld a 2013 appellate ruling that ordered Nippon Steel & Sumitomo Metal Corp. to pay each Korean plaintiff 100 million won (US$88,000) in compensation. The Oct. 30 ruling further soured the frayed ties between Seoul and Tokyo.

Four female victims, including an 87-year-old surnamed Yang, filed the damages suit in 2012 for working without pay at a Mitsubishi aircraft plant in Nagoya in 1944.

They claim they were tricked by their school headmaster into believing that they would earn lots of money if they enlist in the Korean Women's Volunteer Labor Corps.

They had sued the Japanese company in Japan, but the highest court ruled in favor of Mitsubishi in 2008. They lodged a suit in Korea, winning the appeal in 2015 that ordered Mitsubishi to pay a total of 562 million won, around 100 million won each.

Six other victims, including a 72-year-old surnamed Park, filed for damages against Mitsubishi for toiling without pay at Mitsubishi's Hiroshima munitions and shipbuilding plant in 1944.

Korea was under Japan's brutal colonial rule from 1910-45.

South Korea says Japanese leaders do not sincerely repent for the past wrongdoings and refuse to take full legal responsibility.

Japan claims all reparation issues have been settled in a 1965 treaty that normalized their diplomatic ties. (Yonhap)