Subseries 2.1 consists of the personal diaries and notebooks of Masuo Yasui, with some items by Renichi Fujimoto and one by Ichiro Miyake, father of Shidzuyo (Miyake) Yasui. The diaries primarily cover the years 1903-1944, and contain entries on topics such as immigration experiences, railroad work, impressions of Portland, business and economic concerns, courtship and family life, and incarceration during World War II. Except for Masuo Yasui’s diary from the period of his incarceration, all diaries are written in pre-World War II Japanese. Selected partial translations of the diaries by Yuka (Yasui) Fujikura and annotations by Homer Yasui are also included in this subseries. Notebooks in the subseries generally contain practical information, such as expenses or English phrases; language varies by notebook.