Haruko Arimura (有村 治子 Arimura Haruko?, born 1970) is a Japanese politician of the Liberal Democratic Party, a member of the House of Councillors in the Diet of Japan (the national legislature).
A native of Ishikawa Prefecture, she attended the International Christian University in Mitaka, Tokyo and received a master's degree from School for International Training in Vermont, United States and a Ph.D in international business from Aoyama Gakuin University.
Arimura was elected for the first time in 2001. She is affiliated to the openly revisionist organization Nippon Kaigi.