Etsuji Arai

is a former Japanese politician of the Liberal Democratic Party, who served as a member of the House of Representatives in the Diet (national legislature). A native of Fukaya, Saitama and graduate of Kanagawa Dental College, he obtained his medical license in 1984 and became the assistant director at a hospital in Fukaya in 1986. He was elected to the Saitama Prefectural Assembly in 2003 (serving for one term) and then to the House of Representatives for the first time in 2005.