Hamachi may refer to:

• Hamachi (fish), a Japanese amberjack or buri commonly used in sushi
• Hamachi (software), a virtual private network (VPN) application
• Hamachi, a fictional character in the manga Yōkaiden
• My Youth Romantic Comedy Is Wrong, As I Expected, a light novel series also known as {{nihongo|Hamachi|はまち}}

• Don Military Flotilla
• Don Millar
• Don Millard
• Don Miller (disambiguation)
• Don Miller (football)
• Don Mills (disambiguation)
• Don Mills LRT (TTC)
• Don Mills Road (Toronto)
• Don Minzoni
• Don Mirault
• Don Mitchell (disambiguation)
• Don Mitchell (politician)
• Don M. McCurdy
• Don Moen (Canadian football)
• Don Moen (football)
• Don Moen (football player)
• Don Moon (educator)
• Don Moore
• Don moore
• Don Moorhead
• Don "Moose" Lewis
• Don Morrison (football player)
• Don Motorway
• Don Mottley
• Don Mountjoy