Hirai
- Edogawa, Tokyo
- Emi Hirai
- Hirai Seijirō
- Hirai Station (Tokyo)
- Hisashi Hirai
- Japan
- Kanako Hirai
- Kazumasa Hirai (disambiguation)
- Kazuo Hirai
- Ken Hirai
- Kenichi Hirai
- Kozaburo Hirai
- Michiko Hirai
- Minoru Hirai
- Momo Hirai
- NJPW
- Naohito Hirai
- Nobukazu Hirai
- Puroresu
- Rio Hirai
- Shinji Hirai
- Shoki Hirai
- Takuya Hirai
- Tarō Hirai
- Terushichi Hirai
- Twice
- Yanosuke Hirai
- Yasunari Hirai