This picture taken on Oct 23, 2018 shows Japan's Chief Cabinet Secretary Yoshihide Suga speaking during a press conference at the prime minister's office in Tokyo. (PHOTO / AFP)
TOKYO — Remarks by South Korean President Moon Jae-in on the issue of forced wartime labor were "extremely regrettable", Japan's top government spokesman said at a press conference on Friday, describing him as trying to shift Seoul's responsibility to Japan.
President Moon's remarks are trying to shift South Korea's responsibility to Japan and it is extremely regrettable
Yoshihide Suga, Japan's chief cabinet secretary
The comments suggest escalating tension between the two nations after Moon on Thursday urged Japan's political leaders not to undermine ties by "politicising" the issue of South Koreans forced to work by Japanese companies during World War Two.
"President Moon's remarks are trying to shift South Korea's responsibility to Japan and it is extremely regrettable," Chief Cabinet Secretary Yoshihide Suga told a regular news conference.
Relations between the East Asian neighbors have been frosty since South Korea's top court ruled in October that Nippon Steel & Sumitomo Metal Corp should compensate four former laborers.
The latest flare-up came after a South Korean court this month approved the seizure of part of the domestic assets of the Japanese steelmaker.
In response, Tokyo demanded diplomatic consultations with Seoul over the issue on Wednesday.
Japan believes that all such claims were settled in a 1965 treaty that normalized relations, Suga said on Friday, and that Seoul has now broken that treaty.
"We think South Korea will respond sincerely," he said.
Ties are also strained over the issue of whether a South Korean warship had locked its targeting radar on a Japanese patrol plane last month.
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