Prime Minister Shinzo Abe on Tuesday pledged ¥45 billion in loans to expand Sri Lanka's sole international airport.

After meeting with Sri Lankan Prime Minister Ranil Wickremesinghe at his office in Tokyo, Abe said the two leaders agreed to upgrade the bilateral relationship to a comprehensive partnership covering a wide range of areas, including politics, security and economics.

"To support its economy, we will further work together with Sri Lanka in three fields: promoting investment, cooperating on a national development plan, and national reconciliation and peace-building" under the enhanced partnership, Abe said.