Takashi Hongo analyses policies and markets of climate change mitigation and adaptation, energy, and industry restructuring, and has been involved in various sustainability related initiatives. He provides advices long term sustainable strategy and risk management to Mitsui & Co., and other companies. He also has been participated in various  study groups and committees of Japanese government.

Before joining the institute, Takashi worked for Japan Bank for International Cooperation (JBIC) as Special Advisor to Governor. He arranged numerous international project finance and policy base lending.

Takashi is Co-chair of Science and Technology Committee for Environment and Energy (Ministry of Education Ministry of Education, Culture, Sports, Science and Technology), Advisor to Japan, expert at ICAO CORSIA Task Force (WG4, FTG and LMR-TG) nominated by Japan.

Takashi is also a Lecturer of Dokkyo University and Hosei University.