Generous regional variation regarding the incidence off cohabiting unions, their years, as well as their matchmaking to help you marriage and you will childbearing (e James Meters. Raymo, Agencies off Sociology, School regarding Wisconsin–Madison, William H. Sewell Building, 1180 Observatory Push, Madison, WI 53706; e-mail: Cohabitation and you can Friends Development in Japan Miho Iwasawa,…