Prime Minister Shinzo Abe has asked South Korean President Moon Jae-in to visit Japan before the planned summit between North and South Korea in late April, Japanese government sources said Tuesday.

He made the request during phone talks with Moon on March 16, but South Korea has yet to respond, and Moon may find it difficult to make time for a visit to Japan amid his preparations for the summit with North Korean leader Kim Jong Un on April 27, the sources said.

Abe wants to get Moon to raise with Kim the issue of North Korea's abductions of Japanese nationals in the 1970s and 1980s.