South Korea and Japan are reportedly in negotiations to hold a bilateral summit on the sidelines of a gathering of the North Atlantic Treaty Organization(NATO) in Washington this week. 

Quoting a diplomatic source, Japan's Kyodo News said on Monday that a meeting between President Yoon Suk Yeol and Japanese Prime Minister Fumio Kishida is being fine-tuned. 

The heads of NATO's four partner states in the Indo-Pacific, namely South Korea, Japan, Australia and New Zealand, are also attending the NATO summit between Tuesday and Thursday.