NAHA, Japan — A 20-year-old U.S. Marine suspected of robbing and killing a Japanese woman at a hotel in Okinawa has been referred to prosecutors as authorities investigate a case that has prompted protests from Japanese officials.
Lance Corporal Devin Jacob Ballard, who is assigned to Marine Corps Air Station Futenma, is suspected of killing Anna Yagi, 39, at a hotel in Naha and taking her wallet and backpack, according to Okinawa Prefectural Police.
Ballard has denied the allegations and remains in Japanese custody.
His case was forwarded to the Naha Public Prosecutors Office on Monday, according to Stars and Stripes.
No formal indictment had been announced in the reports reviewed as of Monday.
Under Japanese law, robbery resulting in death can carry life imprisonment or the death penalty, meaning capital punishment is legally possible if prosecutors bring that charge and Ballard is convicted.
Devin Jacob Ballard, a U.S. Marine who was arrested in connection with the robbery and killing of a woman on Japan’s southern island of Okinawa, is taken to prosecutors’ office Monday, October 5, 2026 | Kotaro Ueda/Kyodo News/Associated Press
Police Investigate Death at Naha Hotel
Police say the killing occurred in the early hours of Saturday, October 3, 2026, at a hotel in Naha’s Wakasa district.
Yagi entered the hotel with a man at about 2:10 a.m., according to Japanese reporting on the investigation. A hotel employee later found her unresponsive in the room at about 4:15 a.m.
An autopsy determined that she died from asphyxiation caused by strangulation, and investigators found marks on her neck that appeared consistent with pressure from a cord-like object, Jiji Press reported.
A police spokesman told Stars and Stripes that Yagi died after Ballard allegedly “pressed on her neck”.
Surveillance footage from the area showed a man entering the hotel with Yagi and later leaving alone carrying her backpack, according to reports on the investigation. Police also allege that her wallet was taken.
Ballard was found walking alone in Okinawa City later on Saturday. Police said tattoos on both of his arms and other physical characteristics resembled those of the man recorded by security cameras.
He was arrested on Sunday on suspicion of robbery and murder.
The allegations have not been proved in court.
Marine Corps Says It Is Cooperating
Ballard is assigned to the III Marine Expeditionary Force and based at Marine Corps Air Station Futenma, the Marine Corps confirmed.
“The Marine Corps takes these allegations very seriously and expects every Marine to adhere to the highest standards of behaviour,” the service said in a statement reported by Reuters.
The U.S. Embassy and Marine Corps expressed condolences and said American authorities were cooperating with the Japanese investigation.
The case has renewed scrutiny of the large American military presence in Okinawa, where most of the roughly 18,000 U.S. Marines stationed in Japan are based.
Japan Lodges Protest With United States
Japanese Prime Minister Sanae Takaichi formally protested to the United States after Ballard’s arrest.
“The occurrence of such an extremely brutal and vicious incident is extremely regrettable,” Takaichi said.
“The government of Japan strongly protests to the US side and strongly seeks maximum cooperation with the investigation,” she added, calling for tighter discipline and measures intended to prevent similar incidents.
Defence Minister Shinjiro Koizumi also condemned the case.
“Such an incident is unacceptable and I am deeply outraged,” Koizumi said in comments carried by Japanese broadcaster NHK and reported by Reuters.
Okinawa Governor Genta Koja and Naha Mayor Satoru Chinen separately met Marine Lieutenant General Benjamin Watson, commander of the III Marine Expeditionary Force, and U.S. Consul General Andrew Ou.
They presented a protest letter calling for stricter discipline among American service members, measures to prevent further incidents, and changes to the agreement governing the status of U.S. military personnel in Japan.
“The fact that such an atrocious crime has again taken place leads us to conclude that U.S. military efforts regarding discipline and human rights education are completely ineffective,” Koja said.
Watson said the Marine Corps would continue cooperating with investigators.
Okinawa has long been the centre of disputes over the concentration of American military bases in Japan.
Crimes involving U.S. service members have periodically triggered protests on the island, including widespread demonstrations after three American servicemen raped a 12-year-old Okinawan girl in 1995.
Ballard remains in Japanese custody while prosecutors consider the case.
