Hiraiwa

Hiraiwa (written: 平岩) is a Japanese surname. Notable people with the surname include:


 * Hiraiwa Chikayoshi (平岩 親吉), Japanese daimyō
 * Kami Hiraiwa (平岩 紙), Japanese actress
 * Yumie Hiraiwa (平岩 弓枝), Japanese writer
 * Yuna Hiraiwa (平岩 優奈), Japanese artistic gymnast