日米姉妹都市協会（ジャスカ)
On October 6, 2025, 16 California mayors, county officials, and civic leaders arrived in Osaka for the beginning of a four-prefecture Smart Cities tour that
Shin Koyamada, Board Chairman of the Japan-U.S. Sister Cities Association (JUSSCA) and a member of the Subnational Committee of CULCON (The U.S.–Japan Conference on Cultural
The United Nations University (UNU) and the Japan-United States Sister City Association (JUSSCA) have officially signed a Memorandum of Understanding (MOU), marking a new strategic
The sister city program was instituted in the United States on September 11, 1956 at the White House Conference when then U.S. President Dwight D. Eisenhower proposed a national citizen diplomacy initiative. The first sister city relationship between a U.S. city and a Japanese city had been established just one year prior in 1955 between the City of St. Paul, Minnesota and the City of Nagasaki, Japan. This was followed by sister city partnerships between the cities of Sendai and Riverside, California in March, 1957, the cities of Okayama and San Jose, California in May, 1957, and the cities of Yokohama and San Diego, California in October, 1957. Today, over 450 sister city/town and state/prefectural relationships exist, representing the world’s largest and oldest such partnerships for both Japan and the United States.
With support from federal governments, corporations and individual partners and members, JUSSCA provides sponsorships and funding to Japanese local sectors, especially smaller cities/towns and prefectures with their existing American sister city partners for Japan-U.S. sister city and state/prefectural programs. JUSSCA aims to benefit both American and Japanese sister city communities by providing international assistance and resources to Japanese subnational governments and nonprofit organizations in Japan to cultivate people-to-people grassroot exchanges for diplomatic, cultural, educational, sports, and economic purposes.
