May 29 – President Lee Myung-bak, Chinese Premier Wen Jiabao, and Japanese Prime Minister Yukio Hatoyama meet in Jeju in a trilateral summit to discuss strengthening trade ties and the Cheonan incident.
On June 5, 2013, Hiromu Nonaka led a delegation including former Prime Minister Yukio Hatoyama to visit Beijing.
To deal with Japan's mounting fiscal deficits the newly elected government of Yukio Hatoyama formed the Government Revitalization Unit in 2009 to look for areas where the budget could be trimmed.
He was Minister of Internal Affairs from 2009 to 2010, in Yukio Hatoyama and Naoto Kan's Cabinets.
In the 2012 general election of the House of Representatives, he stands as LDP candidate in Hokkaidō 9th district seeking to succeed retiring Democrat Yukio Hatoyama.
After the victory of 2009 elections, then-DPJ President Yukio Hatoyama named him as the next house speaker of the House of Representatives.
Yukio Mishima | Yukio Hatoyama | Yukio Tani | Yukio Ozaki | Yukio Ninagawa | Yukio Kasaya | Yukio Hattori | Yukio Aoshima | 26 May 1945. Corporal Yukio Araki, holding a puppy, with four other pilots of the 72nd ''Shinbu'' Squadron at Kaseda, Kagoshima |
He was the first representative from the Yukio Hatoyama to visit Indonesia, where he guaranteed aid to the country in the wake of the 2009 Sumatra earthquakes.