Sachiko Nakamura is a lecturer at Tamagawa University in Japan and holds a Doctoral degree in Applied Linguistics from KMUTT in Thailand. Her research primarily focuses on language learner emotions, self-regulated learning, and engagement, and it has been published in journals such as Studies in Second Language Acquisition, Language Teaching Research, International Journal of Applied Linguistics, and System. She is the co-editor of the book Innovation in language teaching: The case of Japan, published by Palgrave Macmillan, and has contributed chapters for edited books, including the Routledge handbook of the psychology of language learning and teaching and Learner engagement in the language classroom by Multilingual Matters.