Marking the 61st anniversary of the enforcement of the postwar Constitution, hundreds of people gathered Saturday in Tokyo's Hibiya Park to call for keeping Article 9, which renounces war.

Japan should keep Article 9 to avoid becoming an aggressive military force, said Ann Wright, a diplomat-turned-activist from the United States who participated in the gathering, which was organized by pacifist civic groups.

Wright was formerly a colonel in the U.S. Army and served as a diplomat. She resigned in 2003 to protest the Iraq war.