Tragic events in the 20th century such as the division of the Korean peninsula and the Jeju 4·3 Incident produced countless marginalized lives. The marginal man, including the Zainichi Koreans, has been symbolized in the language of prejudice, discrimination, and painful history. The times after the 70th anniversary of the 4·3 Incident call for the need to overcome the era of tragedy and to deconstruct the concept and boundaries of the nation. A boundary is now understood as a concept that transcends language, nation-state, race, and culture, and we have reached a historic moment to discuss the peaceful coexistence in East Asia beyond the boundaries. What forms of boundaries have been created by the 4·3 Incident, and what does it mean to say that we will cross the boundaries? What does it mean to cross the boundaries in studying the 4·3 Incident? Under the topic of <4·3 beyond the Boundaries>, the 4·3 Session in Jeju Forum will reflect on the lives and histories of marginalized people, and explore the future direction for the 4·3.