During World War II, about six million Jews, accounted nearly two-thirds of total Jews, was slaughtered by Nazi Germany. What is the cause of this Holocaust? After the World War II, how the Jews tried to implement the measures of practice of transitional justice? To what extent the implementation of transitional justice could be deemed as an accomplishment? Responsibilities have been clarified, but can we say the trials have been done? Truth has been restored, but some people still continue denying the Holocaust. This paper attempts to understand the Holocaust in the process and transitional justice after the Holocaust. The author argues that by any means bringing the war criminals to the court is to clarify the responsibility for transformation justice. Restoring the truth and permanent preservation of historical memory are to recover the dignity of the victims so as to form reconciliation-oriented and consensus-based transitional justice.