Just as I suspected, the Yoon administration is trying to handle the Naver situation quietly while the Korean left is trying to turn it into an anti-Japanese bilateral political issue. It is all pretty predictable:
The government will respond firmly and strongly to any unfair overseas treatment of South Korean companies, the presidential office said Monday, as the Japanese government has appeared to pressure Naver to sell its stake in the operator of Line, the biggest messenger app in Japan.
LY, the operator of Line, is controlled by a joint venture between Naver — South Korea’s biggest internet portal operator — and SoftBank of Japan. Earlier this year, the Japanese government issued administrative guidance to LY to “review its capital relationship” with Naver, over a massive leak of user information last year, which was interpreted as pressure on the South Korean company to yield control of Line’s operator. (……)
Sung added the government has been checking the Japanese government’s position via diplomatic channels, including through the South Korean Embassy in Japan.
He also sought bipartisan cooperation from political circles, saying, “It is clear that the political frame of some encouraging anti-Japan sentiment damages national interest, and is unhelpful to protecting our businesses and reflecting our interests.”
Yonhap
You can read more at the link, but it is pretty clear the Japanese government is simply putting pressure on Naver to fix the cybersecurity issues.