Nobuo Tanaka is a prominent Japanese economist and former executive director of the International Energy Agency (IEA). He served in this role from 2007 to 2011, where he focused on global energy security and sustainable development. Tanaka has also held various positions in the Japanese government, contributing to energy policy and international cooperation. In addition to his work with the IEA, Tanaka has been involved in several international organizations and initiatives related to energy and climate change. He is known for advocating for the transition to renewable energy sources and addressing the challenges of climate change through innovative policies and technologies.