The US military will deploy 18 F16 fighter jets to Guam for four months from late May.
The military says this is not an aggressive measure and not in response to any particular situation.
It says it's an adjustment that shows the US flexibility in maintaining an appropriate deterrent posture.
The United States plans to move 8,000 Marines and 10,000 dependents from the southern Japanese island of Okinawa to Guam by 2014 as part of a global realignment of U.S. forces.
The Reuters news agency says Andersen Air Force Base has had a bomber presence since March 2004.
Guam has had a U.S. military presence to varying degrees since 1898, when U.S. naval forces captured it from Spain.