Teruyuki Ohno has spearheaded Tokyo's fight against global warming for more than a decade.

The 60-year-old Ohno spent half of his 34-year career with the Tokyo Metropolitan Government working on environmental policies, most recently as director of its environment bureau until mid-July.

He led implementation of a system to reduce greenhouse gas emissions in April 2010, imposing a limit on discharges by large entities and allowing them to trade emissions credits.