Hokkaidō 9th district is a constituency of the House of Representatives in the Diet of Japan (national legislature). It consists of Hokkaido's Hidaka and Iburi Subprefectures. As of 2009, 414,438 eligible voters were registered in the district. In the 2000, 2003 and 2005 general elections, the Liberal Democratic Party's candidate was Hirofumi Iwakura, later mayor of Tomakomai, Iburi Subprefecture. In 2000, Iwakura lost the district to Hatoyama by a margin of less than 3,000 votes.