Hatashima's subject matter expertise includes risk management and institutional performance measurement related to private investment. He conducted assessment of International Finance Corporation (IFC) and Multilateral Investment Guarantee Agency (MIGA) portfolio performance at project, sector and corporate levels. As private sector investment evaluation combines corporate finance, economic assessment, environmental effects and private sector assessment, Hiroyuki used his expertise in both finance and social science to come up with performance assessment and lessons for future operations.

While at IEG, Hiroyuki led a project evaluation of IFC and MIGA's agribusiness, manufacturing, and services (MAS) sector. Other evaluation reports include The International Finance Corporation's Blended Finance Operations. He was one of the co-TTLs for the evaluation of IFC's Approach to Engaging Clients for Increased Development Impact. He also contributed to the assessment of IFC's Experience with Inclusive Business.

Prior to joining IEG, Hiroyuki was an IFC Investment Officer in the Small and Medium Enterprise Department and the Department of Special Operations.

Before joining the World Bank Group, he spent six years in Abidjan, Côte d'Ivoire, with the African Development Bank as a financial risk management officer and a country economist. He also held various positions in a research institution, banks, and a brokerage firm in Tokyo, Japan.

Hiroyuki holds a MPhil in Development Studies from the University of Sussex, a MSc in Financial Economics from the University of London, and a BA from McGill University