There are complaints of discrimination and claims that Okinawans are forced to serve an "expendable role to protect mainland Japan," said Hiromori Maedomari, an Okinawa International University politics professor.
Some people have started calling for independence from Japan.
After seeing their requests repeatedly ignored, many Okinawans, including younger generations for whom U.S. bases are part of their daily lives, feel there is no use speaking out, said Jinshiro Motoyama, 31, a key organizer of the 2019 referendum.