A group of U.S. fathers urged Japan on Monday to comply with the international convention for settling cross-border child custody disputes and help them and other American parents reunite with their children living in Japan.

The fathers and their supporters, including a veteran congressman, handed a petition to a minister at the Japanese Embassy in Washington the day before Japan's implementation of the Hague Convention on the Civil Aspects of International Child Abduction.

They were among some 20 people who marched through the U.S. capital holding placards with their children's pictures and met with a government official earlier in the day to increase awareness of offspring taken to Japan by estranged parents, usually wives.