Anti-US base protesters trying to get inside of the restricted area during construction work for the relocation of U.S. Marine Corps Air Station Futenma on February 8, 2017 in Nago, Okinawa prefecture, Japan. Japan's government started offshore construction work Monday on relocating a U.S. Marine base in Okinawa. (Photo by Richard Atrero de Guzman/NURPhoto) (Photo by Richard Atrero de Guzman/NurPhoto via Getty Images)

Anti-US base protesters trying to get inside of the restricted area during construction work for the relocation of U.S. Marine Corps Air Station Futenma on February 8, 2017 in Nago, Okinawa prefecture, Japan. Japan's government started offshore construction work Monday on relocating a U.S. Marine base in Okinawa. (Photo by Richard Atrero de Guzman/NURPhoto)

 (Photo by Richard Atrero de Guzman/NurPhoto via Getty Images)