Masashi graduated from Rikkyo University, Department of Business Administration, Faculty of Economics, and worked as Secretary of a member of the House of Representatives and corporate sales for the 1st listed company, then he joined in a US executive search firm. He worked as consultant specializing in the IT and electronics fields and had management experience as well. He then changed his career to corporate HR, working at multinational companies, Ericsson Japan, Bureau Veritas and ZTE Japan, matured his HR skill and knowledge, and joined GESHER in November 2025.