US military personnel and civilian contractors working for American forces have been accused of multiple crimes in Okinawa this year. From January to October 2017, two have been arrested on allegations of robbery, two on allegations of rape and six on allegations of violent offenses, according to the Okinawa Prefecture Police website. Last year, US sailors in Japan were banned from drinking for an 11-day period after a petty officer was accused of driving on the wrong side of the road, hitting two cars and injuring two people, while under the influence of alcohol. In 2016, two incidents in the space of three months prompted widespread public anger -- in March, a US service member was arrested on suspicion of raping a Japanese tourist, and in May, a civilian contractor at a US base in Okinawa was arrested in connection with the death of a 20-year-old woman.