Hiroyuki Arai

is a former Japanese politician, who served as a member of the House of Representatives and the House of Councillors in the Diet (national legislature). A native of Tamura, Fukushima and graduate of Waseda University, he had served in the Fukushima Prefectural Assembly for one term starting in 1987. He was elected to House of Representatives for the first time in 1993 after running unsuccessfully in 1990. After losing the seat in 2003, he was elected to the House of Councillors for the first time in 2004 as a member of the Liberal Democratic Party.