Kumamoto at-large district is a constituency in the House of Councillors of Japan, the upper house of the Diet of Japan (national legislature). It currently elects 2 members to the House of Councillors, 1 per election. The current representatives are: * Seishi Baba, first elected in 2013. Term ends in 2025. Member of the Liberal Democratic Party. * Yoshifumi Matsumura, first elected in 2004. Term ends in 2022. Member of the Liberal Democratic Party. The district has an electorate of 1,465,399 as of May 2021.