Katsuya Okada is a Japanese politician who was Deputy Prime Minister of Japan from January to December 2012. A member of the House of Representatives of Japan, he is the President of the Democratic Party of Japan (DPJ) and served as Secretary-General three times. From September 2009 to September 2010, he was Foreign Minister of Japan. As foreign minister, Okada was one of the chief participants in negotiations with the United States (US) over the relocation of Marine Corps Air Station Futenma on Okinawa. The Foreign Ministry under Okada also confirmed the existence of a long-rumored secret pact between Japan and US which had allowed the US military to carry nuclear weapons into Japanese territory in contravention of the Treaty of Mutual Cooperation and Security between the United States and Japan. The previous administration under the LDP had denied that such a pact existed. Okada ran in the DPJ leadership election held in January 2015 after former president Banri Kaieda resigned. He won and returned as DPJ leader after 10 years.