Hirai
Hirai is a family name for the following people:
- Hirai Fujio (1911–1993), Japanese writer under the stage name Noguchi Fujio
- Ken Hirai (* 1972), Japanese R&B and J-pop singer
- Hirai Minoru (1903-1998), founder of Kōrindō-Aikidō
- Naohito Hirai (* 1978), Japanese football player
- Shinji Hirai (* 1961), Japanese politician
- Hirai Tarō (1905–1973), Japanese politician
- Kazuo Hirai (* 1960), Japanese manager
- Shintarō Hirai (* 1984), Japanese football player
- Shōki Hirai (* 1987), Japanese football player
- Tomisaburō Hirai (1906-2003), Japanese entrepreneur and football official
- Hirai Yasutarō (1896–1970), professor of business administration
