Tokyo has asked Seoul to respond within 30 days to its request for diplomatic talks over court rulings on the use of wartime forced labor by Japanese companies, according to a South Korean media report.

Japan made the request Wednesday, the South's Yonhap news agency quoted government sources in Seoul as saying Sunday, after a court in South Korea approved the seizure of Nippon Steel & Sumitomo Metal Corp. assets in the country in relation to a ruling over forced labor during Japan's colonial rule of the peninsula from 1910-1945.

The report came just days after diplomatic sources in Tokyo indicated that the issue has also been raised by Pyongyang.