Collection consists of Yuji Ichioka's correspondence (1970-2002), research papers, writings, teaching materials, rare Japanese American periodicals, and miscellaneous subject files. The research papers contain photocopies of Japanese immigrant publications and newspaper clippings, Japanese diplomatic papers, American and Japanese magazine articles, and U.S. National Archives materials, which are related to various aspects of Japanese American experiences running mainly from the 1880s to 1945. Though these materials provided a basis for the writing of his articles and books, there are great deals of primary sources that are untapped and therefore help researchers pursue original historical studies. Researchers should be also aware that because Ichioka periodically deposited some of his research acquisitions, especially Japanese American personal papers and rare books, as part of UCLA's Japanese American Research Project collections, the materials included in this collection constitute only portions of what Ichioka had collected for over thirty years of his career. Drafts and revision notes of Ichioka's published articles and books are included in this collection, as the instructional materials that he developed are also available. His professional correspondence, albeit closed for use for ten years from accession, would be useful for understanding Ichioka's day-to-day operation as a scholar and teacher, his service to the fields of Japanese American history and Asian American Studies, and his interactions with scholars and intellectuals in not only the United States but also Latin America and Japan. Others papers pertain to Ichioka's role in the development of Asian American archival collections at UCLA and the organization of academic conferences.