The World War II mass incarceration of Japanese Americans was a traumatic event that had lasting repercussions on multiple communities. Archaeologists have sought to productively pursue community-based methodologies in studying this period, employing object-based oral histories, outreach events, and community participation in fieldwork. However, less scholarly attention has looked to the ways in which materials have become central to understanding and mobilizing around the incarceration camp history. Acts of pilgrimage, memorialization, scholarly study, and activism constitute key arenas through which this heritage is participated with, each interacting with materials in different ways. This article discusses three cases of material engagements, from the politics of object ownership to origami activism and their importance in reckoning with this violent past. Materials in these cases are not passive objects but rather spur actions and create new publics. Furthermore, the physical qualities of materials shape both the ways in which they are engaged and the politics that surround their rhetorical deployment.