Kumamoto 2nd district is a current single-member electoral district for the House of Representatives, the lower house of the National Diet of Japan. It is located in Kumamoto and covers Western parts of the prefectural capital Kumamoto (parts of Nishi-ku, shared with the 1st electoral district and parts of Minami-ku, shared with the 4th district), the cities of Arao and Tamana and the Tamana county with its remaining four municipalities, the towns of Nagasu, Nankan, Nagomi and Gyokutō. As of September 2012, 305,563 eligible voters were resident in the district.