Densho is an organization that is dedicated to "preserving the testimonies of Japanese Americans who were unjustly incarcerated during WWII before their memories are extinguished." The website does offer a great deal of information and document to support this mission; however, there is much more! There is a huge archive with photographs, newspaper articles from around the country, immigration documents, proof of citizenship documents, photographs of artifacts, and videotapings of interviews with the grandchildren of the first generation of immigrants. Many of these archived documents date back to the late 1800s.
There is also a filter with a timeline and a glossary that is useful in understanding the events during the period of immigration through WWII and the period of incarceration.
The site is a great resources for teachers and students alike!