Mayuko Totsuka is a Japanese investor and wealth-building consultant. While working as a company employee, she learned about investing and asset accumulation from wealthy individuals in Japan and abroad, and subsequently developed an investment approach centered on tangible assets such as real estate. In Ichinen de Okuribito ni Naru, she draws on her own experience to explain how tangible, income-producing assets—and the strategic use of borrowing—can offer an alternative to relying solely on savings and financial securities.