Hamachi may refer to:
- Hamachi (fish), a Japanese amberjack or buri /yellowtail commonly used in sushi
- Hamachi (software), a virtual private network (VPN) application
- Hamachi, an uncommon Japanese family name written as 濱地 or 浜地
- Hamachi, a fictional character in the manga Yōkaiden
- My Youth Romantic Comedy Is Wrong, As I Expected, a light novel series also known as Hamachi (はまち)