This volume presents contributions to a conference held in April 2013 in Tokyo, Osaka, and Kyoto. The participants came from Northeast Asia. A special guest, Ms. Christiane Tietz, represented Germany, the country to which Dietrich Bonhoeffer (1906 - 1945) belonged. This theologian's thinking was presented by scholars who had studied his work and life with a view to Ecumenism today. Trenches dug to delimit national and religious corporate bodies must and can be overarched when, in the spirit that Bonhoeffer testifies to, the path toward life together in peace is followed, however daringly and costly it is to give up one's own entrenched security.