研究分野	外国語教育学，第二言語習得論，応用言語学
キーワード	語彙習得，言語評価，教育文法，学術目的の英語
研究テーマ	第二言語習得、語彙学習、言語評価、教育工学を中心に研究しています。近年は、統計モデリング、機械学習、自然言語処理、大規模言語モデルなどの量的・計算的手法も積極的に取り入れています。
代表的著書，論文等	最近の出版（抜粋） Sasao, Y., & Liang, Z. (2026). New directions in vocabulary learning and teaching. In A. Tajino (Ed.), English language teaching: Current issues and future prospects I: Voices of practitioner researchers in Japan (pp. 81–94). Springer. https://doi.org/10.1007/978-981-95-6163-6_6 Mathieson, P., & Sasao, Y. (2025). Minimizing mixed-methods mix-ups: Lessons from a research project in a hybrid second language learning course. In SAGE Research Methods: Data and research literacy. SAGE Publications. https://doi.org/10.4135/9781036216306 Mathieson, P., Bolstad, F., & Sasao, Y. (2024). Developing a word family-based depth of academic word knowledge test. European Journal of English Language Studies, 4(3), 137–154. https://doi.org/10.12973/ejels.4.3.137 Zeilhofer, L., & Sasao, Y. (2022). Mindful language learning: The effects of college students’ mindfulness on short-term vocabulary retention. System, 110, 102909. https://doi.org/10.1016/j.system.2022.102909 Sasao, Y, Webb, S. (2020). The guessing from context test. In S. Webb (Ed.) Approaches to Teaching, Learning, Testing, Researching L2 Vocabulary. (pp. 117-142). Amsterdam: John Benjamins Publishing Company. Sasao, Y. (2020). Measuring the ability to learn words. In S. Webb (Ed.), The Routledge Handbook of Vocabulary Studies. (pp. 419-432). London: Routledge. Sasao, Y. (2019). Vocabulary teaching: A systemic perspective. In A. Tajino (Ed.), A Systems Approach to Language Pedagogy. (pp. 39-47). Singapore: Springer. Mizumoto, A, Sasao, Y, Webb, S. A. (2019). Developing and evaluating a computerized adaptive testing version of the Word Part Levels Test. Language Testing, 36, 1, 101-123 Sasao, Y, Webb, S. (2018). The guessing from context test. ITL – International Journal of Applied Linguistics, 169, 1, 114-140 Sasao, Y. (2018). MAP grammar and vocabulary. In A. Tajino (Ed.), A new approach to English pedagogical grammar: The order of meanings (pp.128-136). Oxford: Routledge Webb, S, Sasao, Y, Ballance, O. (2017). The updated Vocabulary Levels Test: Developing and validating two new forms of the VLT. ITL – International Journal of Applied Linguistics, 168, 1, 33-69 Yosuke Sasao, Stuart Webb. (2017). The Word Part Levels Test. Language Teaching Research, 21, 1, 12-30
所属学会,その他の研究活動等
担当授業	学部 大学院修士課程 大学院博士課程 全学共通科目
経歴等	京都大学 総合人間学部 卒業 京都大学大学院 人間・環境学研究科 修士課程 修了 Victoria University of Wellington (New Zealand), School of Linguistics and Applied Language Studies, 博士課程 修了 Ph.D. in Applied Linguistics