This article aims to elevate the appreciation of Dr Michael D. Fetters's contributions to mixed methods pedagogy by highlighting his innovative teaching methods called the "mixed methods treasure hunt." Utilizing Vygotsky's sociocultural theory, this paper provides a detailed examination of how Fetters's legacy can be adapted and extended to Japan and beyond. It explores the efficacy of the mixed methods treasure hunt as a pedagogical tool, offering promising solutions for mixed methods research education. This paper contributes to the field by providing a practical methodology that bridges the gap between theoretical knowledge and practical application and enhances learning opportunities, especially for mixed methods learners in the East Asian cultural context, thereby broadening the applicability and impact of Fetters's legacy.