Rui Arai (新居 るい, Arai Rui, née Matsukawa, 松川; February 26, 1971) is a Japanese politician and diplomat who serves as a member of the House of Councillors representing the Liberal Democratic Party. She previously served as Parliamentary Vice-Minister of Defense and Parliamentary Vice-Minister of Cabinet Office. She is the wife of diplomat Yūsuke Arai.
Source: “Rui Matsukawa”, English Wikipedia (CC BY-SA 4.0), excerpt