premise: It also urged the government to take "comprehensive and effective" measures to boost the Okinawa economy.
  Last week, the Japanse parliament passed legislation allowing the US military to keep using land in Okinawa amid protest from landowners and their supporters.
  Okinawa has been a major headache for successive governments following the rape of a 12-year-old girl by three American servicemen in 1995. The rape triggered outrage among locals and prompted the prefectural governor, Masahide Ota, to seek the complete withdrawal of American troops by 2015.
  The southern island prefecture is home to more than half of the 47,000 American troops in Japan and also accounts for about 75 percent of US military facilities on the entire archipelago.
  
  
   Why did the government have to take comprehensive and effective measures?
hypothesis: outrage among locals