Article 9 of the Japanese Constitution renounces war as a means of settling international disputes and prohibits the maintenance of armed forces and other war potential. In light of the Japanese government's pressure to amend it, Peace Boat together with the Japan Lawyers' International Solidarity Association (JALISA), launched the Global Article 9 Campaign to Abolish War, which strives not only to protect Article 9 locally, but also to build an international movement supporting Article 9 as the shared property of the world, calling for a global peace that does not rely on force. Peace Boat serves as the Secretariat of the campaign.

Article 9 of the Japanese Constitution was legislated in 1946, immediately following the end of the Second World War.

Prior to, and during the war, Japan colonized the Korean Peninsula, Taiwan, the islands in the Pacific, and invaded China and other countries in the Asia Pacific region. Japan is responsible for causing considerable harm to the people living in Asia, including inhumane atrocities; such as the coercion of labor, genocide, human experiments, and "Comfort Women" (sex slaves). 20 million people are said to have fallen victim. At the same time in Japan, an approximate 3 million people, many of them civilians, lost their lives in the air-raids, the ground war in Okinawa, and the dropping of the atomic bomb on Hiroshima and Nagasaki.

In the Potsdam Declaration (July 1945) Japan accepted at the end of the war, the wrongness of Japan's war of aggression was confirmed. Article 9 was legislated under the understanding that the most effective means to guarantee Japan to never wage war again, was not to possess any war potential.

Article 9 was legislated in deep reflection of Japan's war of aggression and colonial rule. Therefore, Article 9; the renunciation of war, and the prohibition of maintaining any war potential, is Japan's pledge and vow to the people of Asia, the Pacific, and the world, to never again repeat its mistakes.

Furthermore, in order for Japan to have fulfilled its war responsibility, it must have fully compensated for its past and must have apologized to the victims in Asia. It is only the least of fulfilling its war responsibilities for Japan to uphold its vow of never again waging war. We believe, that for this, and to stand by its pledge to the people of Asia, the Pacific, and the world, Japan must uphold and build on Article 9.