Toshi is interested in a wide range of human learning and memory topics, such as memory control, metacognition, reading comprehension, and category learning. The overarching goal of his research program is to formulate practical techniques that can improve educational instructions and increase efficacy in self-regulated learning. Questions driving his current projects include: Can category learning be enhanced by utilizing multiple-level category information? Can diversionary thoughts be utilized to enhance relearning? What is the best way to learn foreign language vocabularies?