High-speed rail and the Trans-Pacific Partnership free trade agreement were among key topics discussed during a meeting between Prime Minister Shinzo Abe and Singaporean Prime Minister Lee Hsien Loong in Tokyo on Wednesday.

The pair spoke about the possible introduction of Japan's high-speed railway system in Singapore, and Lee urged the Japanese Diet to ratify the TPP pact.

The two leaders, facing reporters after the meeting, also said they discussed territorial disputes in the South China Sea.