Japanese and Chinese experts have expressed concerns about a possible impact on the security of East Asia resulting from turmoil in South Korea's politics.

The declaration of emergency martial law by South Korean President Yoon Suk-yeol prompted the country's opposition parties to submit a bill to the National Assembly to impeach Yoon. The opposition insists the president's move violated the Constitution.

In Tokyo, former high-ranking officials and academics from Japan and China discussed the situation in South Korea on Thursday, the final day of their three-day meeting.

Former chief of staff of Japan's Self-Defense Forces Joint Staff, Kawano Katsutoshi, noted that it is inevitable for the Yoon administration to lose its political power quickly. He said it is highly likely that the trilateral framework of Japan, the United States and South Korea to cooperate in deterring North Korea would be destabilized.

Zhang Tuosheng, who is a senior researcher at a Chinese think tank, said that South Korea is the best example where people's support for their government is very low, and a similar situation also exists in Japan.

He noted that such a tendency can be an issue that challenges security in the region.