The defense chiefs of South Korea and Japan met in Seoul on Monday to discuss cooperation across a range of issues, including North Korea's growing nuclear and missile threats.

SEOUL, Sept. 8 (UPI) -- The defense chiefs of South Korea and Japan met in Seoul on Monday to discuss cooperation across a range of issues, including North Korea's growing nuclear and missile threats.

The meeting between South Korea's Defense Minister Ahn Gyu-back and his counterpart, Gen Nakatani, marked the first visit by a Japanese defense minister to Seoul since 2015. Nakatani is in town to attend the Seoul Defense Dialogue, an annual security forum that runs from Monday to Wednesday.

The ministers "reaffirmed their firm commitment to the complete denuclearization of the Korean Peninsula and agreed to continue South Korea-U.S.-Japan cooperation in response to North Korea's nuclear and missile threats," they announced in a joint statement.

"They also emphasized the need to jointly address the deepening of military cooperation between North Korea and Russia," the statement added.

North Korea has deployed troops, artillery and missiles to Russia to aid in Moscow's war against Ukraine, and is believed to be receiving financial support and advanced military technology for its own weapons programs in return.

The meeting comes after North Korean leader Kim Jong Un traveled to Beijing last week to attend a military parade commemorating the 80th anniversary of the end of World War II.

Kim stood alongside Chinese President Xi Jinping and Russian President Vladimir Putin at the display of military might in Tiananmen Square, the first time the three leaders have been seen together publicly.

The appearance was viewed by many analysts as a major diplomatic win for Kim in his efforts to further cement North Korea's status as a de facto nuclear state.

Ahn and Nakatani stressed the importance of promoting bilateral security ties and three-way cooperation with the United States amid a "rapidly changing security environment," their joint statement said.

The defense chiefs agreed to boost mutual visits and personnel exchanges while seeking opportunities for high-tech defense cooperation.

"In particular, they agreed to explore future-oriented and mutually beneficial cooperation opportunities in cutting-edge science and technology fields such as AI, unmanned systems and space," the statement said.

Seoul and Tokyo have seen their historically frosty relations thaw in recent years. South Korean President Lee Jae Myung and Japanese Prime Minister Shigeru Ishiba met last month and called for closer cooperation on trade and security issues.

Ishiba, however, announced his resignation on Sunday, raising questions about the future of Tokyo's diplomatic relationship with Seoul.

South Korea's presidential office said Monday that it planned to "continue positive relations going forward" with Japan, news agency Yonhap reported.