IRABU, Okinawa Prefecture-An airstrip on the islet of Shimojijima, far southwest of Okinawa's main island, has been swept up in the United States' geopolitical strategy to transform its armed forces. Besides the U.S. military, the maneuverings involve the Self-Defense Forces, town council intrigue, local fear of Chinese submarines and a mysterious negotiator promising money from the central government. As for the island's strategic value, no one seems quite sure. What is certain is that little progress is being made on construction of an offshore heliport near Henoko in Okinawa's Nago. The facility is intended to replace the U.S. Marine Corps...