Asian Access is an interdenominational, evangelical missions agency. Their site describes their staff and ministry opportunities, as well as information on what Japan needs and how to pray for Japan. Go to Focus, Country Profiles. Japan here.
Pioneers mobilizes teams to glorify God among unreached peoples by initiating church planting movements in partnership with local churches. In Japan, they focus on the SW region.
A long-time mission organization with various fields around the world, including Japan. (SEND was originally known as the Far East Gospel Crusade.) Site has interesting cultural information and more.
Spend a summer in Japan or in the U.S. working with Japanese college students.
Scroll down to see short-term opportunities. Usually looking for someone who speaks Japanese.
Youth With A Mission’s opportunities in Japan.