Masaaki Mezaki graduated from Keio University’s Faculty of Business and Commerce and holds an MSc in Social Anthropology from the London School of Economics (LSE). He began his career as a derivatives trader at Merrill Lynch, specializing in interest rate swaps, working in Tokyo, New York, and London. After leaving Merrill Lynch, he spent nearly a decade traveling to over 100 countries, exploring diverse cultures worldwide. In 2012, he founded Japan Mega Solar Inc. to achieve grid parity through solar power in Japan, later renaming the company GPSS Holdings Inc. in 2017 to expand sustainable energy initiatives nationwide. He actively promotes renewable energy through various media outlets. His publications include “Kōfuku Tojōkoku Nippon” (“Japan: A Developing Country in Happiness”). He also appears on FM Yokohama’s “Baile Yokohama” every Sunday at 21:30.

Born in Tokyo in 1980.
After graduating from Keio university, he spent four years as an economist at Goldman Sachs.

In 2006, he co-founded Motherhouse Co., Ltd. with the representative and chief designer, Eriko Yamaguchi, based on the philosophy of “Showcasing the potential of developing countries.” He joined the management team as a board director and vice president. In 2019, he was appointed Representative Vice President.
He travels extensively, primarily to developing countries, and is involved in both marketing and production.

He presides over the management seminar “Warm Heart, Cool Head,” focusing on realizing one’s visions and ideas.

He also serves as an outside director for Que, Inc., and an external board member for the Japan Blind Football Association.