Naoto Kan is a Japanese politician who served as the Prime Minister of Japan from June 2010 to September 2011. He was a member of the Democratic Party of Japan and played a significant role in the country's response to the 2011 Tōhoku earthquake and tsunami, which led to the Fukushima Daiichi nuclear disaster. Before becoming Prime Minister, Kan held various positions, including Minister of Health, Labour and Welfare. He is known for his advocacy of social welfare policies and his efforts to promote renewable energy in Japan following the nuclear crisis. Kan's leadership was marked by challenges, including economic issues and disaster recovery efforts.