New Delhi, Jan. 14 -- The Japanese and South Korean leaders agreed to deepen cooperation between their countries before they let loose with their own surprise cultural exchange in a surprise jam session drumming to K-pop hits.

The musical performance between Japanese Prime Minister Sanae Takaichi and South Korean President Lee Jae Myung followed Tuesday's summit in Nara, Japan, Takaichi's hometown.

Wearing personalized athletic jackets, they sat side by side and drummed to hits such as BTS' "Dynamite" and Kpop Demon Hunters' "Golden" in a short video posted by Takaichi's office Wednesday.

The jam session was a surprise by Takaichi, a heavy metal fan and an avid drummer in her college days.

Lee, in a message on his own X, thanked Takai...