While most of this collection is in English, approximately 20 percent of the materials are written in a pre-World War II Japanese script that is distinct from modern Japanese. A few items were translated by family members before the collection was donated to the Oregon Historical Society Research Library; these translations were retained in the collection and are noted where available. During a grant-funded project in 2023-2024 (see sponsorship note), staff and translators selected approximately 150 additional documents or excerpts for translation into English and modern Japanese, based on their historical significance or representativeness of the content of the collection. These translations are included in the collection and viewable online in OHS Digital Collections. Translators also provided brief interpretations in English for untranslated materials.