By
Relations between Tokyo and Seoul were badly damaged in August when Lee made a surprise visit to the Dokdo islands, which lie between the two countries. Japan claims them as the Takeshima islands.
Aso, of the opposition Liberal Democratic Party, will visit Seoul from Sunday to attend a two-day conference of the Japan-Korea Cooperation Committee, which includes parliamentarians and business leaders, Kyodo News and Jiji Press said, citing unnamed political sources.
He is planning to meet Lee on Monday.