Hiroi

Hiroi (written: 廣井) is a Japanese surname. Notable people with the surname include:


 * Noriyo Hiroi (廣井 法代), Japanese alpine skier
 * Oji Hiroi (広井 王子), real name Teruhisa Hiroi (廣井 照久), Japanese manga artist
 * Tomonobu Hiroi (廣井 友信), Japanese footballer