Prime Minister Shinzo Abe will tell U.S. President Barack Obama when they meet, probably in February, that he wants to speed up the procedure for Japan to join the international treaty on settling cross-border child custody disputes, sources said Wednesday.

The previous administration led by former Democratic Party of Japan leader Yoshihiko Noda had already made participation in the 1980 Hague Convention on the Civil Aspects of International Child Abduction an international commitment.

The Abe team is aiming to submit a bill to the Diet early this year to endorse the convention, which sets rules for the prompt return of children under 16, taken or retained by one parent following the failure of international marriages, to the country of their habitual residence.

Domestic legislation is necessary to join the convention, but a related bill was scrapped when the Lower House was dissolved in November.

Among the Group of Eight nations, Japan is the only one yet to join the convention and has been facing calls from the United States and European countries to get on board soon.