NARA, Japan — Japanese Prime Minister Sanae Takaichi and South Korean President Lee Jae-myung played drums together on Tuesday after their summit talks in Nara, the capital of her home prefecture, in a surprise event showcasing their amicable personal relationship.

Japanese Prime Minister Sanae Takaichi has drawn attention for borrowing a line from the popular anime *Attack on Titan* and saying, “Just shut your mouths. And invest everything in me!” According to reports by Japanese local media, including the Asahi ...