The collection documents the life of Katsuji Nakashima since his arrival in Canada in 1909. The material consists of a personal handwritten journal written on rice paper in ancient Japanese; a Dominion of Canada certificate of Naturalization issued in 1919; a passport issued by the Imperial Japanese Government (1921); invitations, bills and other ephemeral items (ca. 1910-1945); military photographs; an Internment Camp Ration Book; and other personal documents reflecting the civilian and military activities of Katsuji Nakashima. The collection also contains personal belongings such as Buddhist prayer items.