The joint international educational project has been developing between Hokkaido University and Jeju University based on reparations cases in both islands of tragedies. There are many reasons why I as a Japanese civil law/ reparations scholar have got interested in the Jeju tragedy: the need for building peace-making network, the historically- strong relationship between Jeju and Japan, and the continuity of violence between the Korean right-wing soldiers at the Jeju mass killing and the Japanese soldiers in the colonization era. The challenges of Jeju reparations are still immense: including most importantly, unfinished individual symbolic and economic reparations and the US responsibility. To attain true reconciliation, more Americans should know these past injustices in accordance with the theoretical framework/ process of reconciliation: (1) fact findings of past injustice and their recognition, (2) the admittance of historical responsibility (3) sincere apologies and supplementary reparations from perpetrators’ sides, and then (4) forgiveness from victims’ sides. As for the Jeju tragedy, international efforts towards this direction is imminently required.