1 of 2 | US President Donald Trump (R) and Japan Prime Minister Sanae Takaichi (L) attend a meeting with relatives of Japanese nationals abducted by North Korea at the Akasaka Palace State Guest House in Tokyo, Japan. Photo by KIYOSHI OTA / EPA

May 20 (Asia Today) -- Japan is intensifying efforts to pressure U.S. political leaders and public opinion over the issue of Japanese citizens abducted by North Korea, seeking to ensure the matter remains part of future U.S. policy toward Pyongyang.

The campaign reflects growing concern in Tokyo that the abductee issue could be sidelined if Washington resumes negotiations with North Korea focused primarily on nuclear weapons and missile programs.

Japanese newspaper Sankei Shimbun reported Tuesday that the Japanese government has, since last year, sought meetings with former members of the U.S. Congress and expanded outreach efforts targeting American political and policy circles.

Officials from the Japanese Embassy in Washington have reportedly led the effort, while Tokyo has also engaged experts and opinion leaders with influence over U.S. public discourse. Japan has additionally used opinion advertisements published in The Washington Post as part of its advocacy campaign.