On Nov. 28, Okinawa Governor Denny Tamaki disclosed that he had presented to the central government the Okinawa prefectural government’s estimate of costs for constructing a new base at the Henoko district of Nago City, Okinawa Prefecture, in association with the relocation of the U.S. military’s Futenma airfield. During intensive consultations with the central government, Tamaki told the government that landfill construction costs will be swelling to 2.55 trillion yen.
Construction costs up to the current stage of shore protection work have now increased tenfold from the originally planned, and the prefectural government factored this in its calculation. According to the calculation, the Defense Ministry’s estimate of 240 billion yen, shown in its funding plan, for the entire landfill construction will increase tenfold. On top of that, the prefectural government, taking into account costs arisen from airfield expansion at the U.S. military’s Iwakuni base in Yamaguchi Prefecture, added costs for soft ground improvement work and for additional dirt procurement.
Furthermore, the prefectural government pointed out that a total of 13 years will be needed until the completion of the whole construction: 5 years for landfill work, 5 years for soft ground improvement work and 3 years for facilities construction after the completion of landfill. A senior official of the prefectural government said, “Henoko relocation will not lead to removing Futenma’s danger at the earliest possible time and I don’t understand why the central government continues such high cost construction needing more than two trillion yen,” calling for the national government to study ways other than the Futenma relocation to Henoko.
The Okinawa prefectural government’s tentative calculation for construction costs is a rough estimate to underpin its assertion and is not based on an official survey.