thediplomat.com | 2013-Sept-22
...this contest for control is confined to shoving matches largely between Chinese and Japanese Coast Guard ships, which take several days to deploy. However, China is now developing the means to project decisive force to these islands in hours, not days. Should China gain the upper hand in this arms race there is a greater chance it will use force to occupy the islands and then set its sights on the strategically more attractive nearby Sakashima island group.
For now, though, the upper hand is held by the United States, which has just completed the initial deployment of 24 U.S. Marine Corps Bell-Boeing MV-22B Osprey conventional, or twin tilt rotor aircraft, to Futenma Base in Okinawa... the 24 MV-22Bs at Futenma could potentially put about 500 troops or about 140 tons of weapons and material on the Senkakus or the Sakashimas in about one hour.
On September 17, 2013, Kyodo reported that current commander of U.S. Marine forces on Okinawa, Lt. General John Wissler, told Okinawa Governor Hirokazu Nakaimu about the Osprey, “That aircraft has the ability to reach the Senkakus, should we need to support any sort of Japan-U.S. security treaty.”
China is also accumulating rapid lift assets. The People’s Liberation Army Navy (PLAN) has taken delivery of the first Ukrainian-built Zubr (Bison) large hovercraft. The first example, delivered in May, is now undergoing final modifications in Shanghai.
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