Japan wants the ability to hit Chinese military bases, another reflection of the rising prospect of war in east Asia. As we read in the Japan Times:

Tokyo and Washington agreed to deploy a more agile and capable U.S. Marine unit to Okinawa, ramp up joint surveillance operations, expand the shared use of military facilities as well as increase bilateral exercises and training, including on and around Japan’s remote southwestern islands.

They also decided to deepen bilateral cooperation toward the “effective employment of Japan’s counterstrike capabilities in close coordination with the United States,” a reference to the long-range weapons Tokyo aims to acquire that would enable it to strike enemy bases in the event of an attack.