Born in Tokyo, Aramasa moved with his family to Manchukuo in 1940.
In 1980 he met his parents, from whom he had been separated, and started work on a photographic contribution to the effort of reuniting Japanese war orphans and their biological parents.
This work branched into the photography of people of Japanese descent in Hawai'i and South America.
[2] A Portrait of Japanese Immigrants to South America won the Domon Ken Award in 1986; Aramasa subsequently won various other awards.
[2] Aramasa has taught at Musashino Art University from 1993.