The founder and CEO of Response Ability, Inc., a sustainability consultancy based in Kyoto, Executive Director of Japan Business Initiative for Biodiversity (JBIB) and a board member of Japan Ethical Initiative (JEI).
He is a scientist by training, received BSc from The University of Tokyo, MSc and PhD from Graduate School of Science, The University of Tokyo.
After working for National Institute for Environmental Studies (NIES) and FRIM (Forest Research Institute Malaysia) as a researcher, he started his career as a consultant on sustainability in 2002.
He has been involved in and led numbers of projects by leading Japanese corporations and ministries to develop sustainability policies and implement them in their daily operations. He also gives advice to business executives on sustainable business management and to produce sustainable business models.
He is a member of various governmental committees and an advisor to sustainability related societies and forums both in Japan and internationally.

Joined Bridgestone Corporation in 2004. Established the environmental strategy planning function for promoting carbon management, refining Environmental Mission Statement, formulating Long-term Environmental Vision. In 2015, engaged in CSR promotion activities and supervising global CSR and environmental strategy planning and promotion. In 2018, engaged in corporate planning in global HQ. In 2019, established the corporate sustainability function and leading global sustainability activities.

Masa joined SMBC (former Sumitomo Bank) in 1993.
After working in various areas such as real estate and aircraft finance,
corporate restructuring, and investor relations,
he served in London for 5 years from 2017.
Masa returned in April 2022 as the General Manager of the Corporate Sustainability Department, and assumed the current position in April 2023.