Hiraiwa
# Hiraiwa

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

* Hiraiwa Chikayoshi (平岩 親吉, 1542–1611), Japanese daimyō
* Kami Hiraiwa (平岩 紙, born 1979), Japanese actress
* Yumie Hiraiwa (平岩 弓枝, born 1932), Japanese writer
* Yuna Hiraiwa (平岩 優奈, born 1998), Japanese artistic gymnast
