By Tim Kelly and Joyce Lee TOKYO (Reuters) -Japanese Prime Minister Shigeru Ishiba and South Korean President Lee Jae Myung agreed on Saturday to closer security and economic ties ahead of Lee's planned summit with U.

South Korean President Lee Jae Myung is in Tokyo to hold his first full summit with Japanese Prime Minister Shigeru Ishiba in a visit largely aimed at showcasing friendly ties between the two Asian neighbors that now face common challenges from America,

TOKYO (Reuters) -South Korean President Lee Jae Myung arrived in Japan on Saturday for a summit expected to reaffirm security cooperation between the two East Asian neighbours before Lee meets U.S. President Donald Trump in Washington on Monday.