Great, prefecture-by-prefecture listing of English-capable attorneys in Japan, including attorneys with expertise in family law (divorce, child custody, etc.) issues.
(URL current as of Nov. 17, 2010. If URL no longer works, do a search for “US Embassy”+”Tokyo”+”attorneys” OR click on “U.S. Citizen Services” from top page of U.S. Embassy website, then go to left-side menu bar, click on “Resources” and select “Lawyers,” which will take you to the prefecture-by-prefecture listing).