Japan protests to Washington after Marine arrested in Okinawa killing

Japanese police arrested a 20-year-old U.S. Marine on suspicion of robbing and killing a 39-year-old local woman at a hotel in Naha, the capital of Okinawa, in the early hours of Saturday, and Prime Minister Sanae Takaichi's government lodged a protest with Washington the next day.

The case deals a major shock and adds fear to the Okinawans who have already been forced to live next to U.S. bases

Okinawa prefectural police identified the Marine as Lance Corporal Devin Jacob Ballard, 20, who is stationed at Futenma Air Station and assigned to the III Marine Expeditionary Force. He is suspected of killing Anna Yagi, 39, in a hotel room in Naha and taking her wallet and backpack. Ballard denied the allegations, police said.

What police say happened

Yagi's body was found in her hotel room and she appeared to have been strangled to death, the Kyodo News agency reported, citing police. She was found at about 4:30 a.m. on Saturday and was pronounced dead at the scene. Her backpack was later recovered near the hotel with her wallet still inside, public broadcaster NHK reported.

Security camera footage showed the man believed to be the suspect entering the hotel with the victim and coming out alone, police said. NHK and other Japanese outlets, citing investigation sources, reported that footage from near the scene showed a foreign man entering a room with a woman and later leaving with her belongings.

We have lost a family member and are deeply saddened. My parents, in particular, are utterly devastated at the loss of their daughter

A police officer spotted Ballard walking in an entertainment district in Okinawa City, about 15 miles northeast of Naha, late on Saturday, and he was arrested early Sunday. His shaved head and the tattoos on his arms matched those of the man in the security footage, Kyodo News reported.

Prefectural police counted 101 criminal cases involving U.S. military personnel on Okinawa in 2025, up from about 40 in 2020.

Takaichi described the crime as "exceptionally brutal and vicious" and said Japan had lodged a protest with U.S. authorities. Her government asked Washington for maximum cooperation with the investigation and for stricter discipline among service members, along with measures to prevent a recurrence.

Tokyo summons the ambassador

Foreign Minister Toshimitsu Motegi summoned U.S. Ambassador to Japan George Glass to his office and conveyed outrage, the foreign ministry said in a statement. Glass expressed condolences to the victim's family on social media and said the United States is cooperating with Japan's national and local governments.

Defense Minister Shinjiro Koizumi summoned Lt. Gen. Stephen Jost, the commander of U.S. Forces Japan, to his ministry. "Incidents and accidents involving U.S. military personnel cause great anxiety among the local community and must not be allowed to happen," Koizumi said.

The U.S. Marine Corps said it is fully cooperating with Japanese authorities and that it "takes these allegations very seriously and expects every Marine to adhere to the highest standards of behavior." The U.S. Embassy in Tokyo said it was aware that a service member was in police custody following the death of a Japanese national in Okinawa and extended condolences to the victim's family.

Glass said on Monday that he was telling U.S. military commanders of the need "to hold our American service members to the very highest levels of discipline and integrity."

Jurisdiction and the next step

Under the status of forces agreement, Japan has the primary right to exercise jurisdiction over crimes committed off base while U.S. personnel are not on duty, and the United States has that right for crimes committed on base or on duty. The case is being handled by Japanese authorities because Ballard was not on duty and was arrested off base.

Prosecutors in Naha began examining the case on Monday and are expected to decide in the coming weeks whether to press formal charges. If convicted, he could face life in prison or the death penalty.

About 100 people joined a rally in Naha on Sunday, Al Jazeera reported, condemning the killing and renewing demands that U.S. military bases be removed from the island.

On Monday, Koja told Lt. Gen. Benjamin Watson, the commander of the III Marine Expeditionary Force, and Andrew Ou, the U.S. consul general in Naha, that he wanted effective measures to prevent a repeat. Watson said he recognized the concern and anxiety the case had caused among Okinawa residents and pledged to be good neighbors. "I must say, discipline and troop education are not working at all," Koja had told reporters at the weekend.

Okinawa and the U.S. bases

The United States has about 54,000 military personnel stationed in Japan, most of them on Okinawa, which it held from the end of World War II until 1972. Okinawa hosts about 70 percent of U.S. military facilities in Japan under a security treaty first signed in 1951 and revised in 1960.

Futenma, which sits in a densely populated part of central Okinawa, has been a sore spot for residents for decades, and the central government approved relocating the base to Henoko on the island's eastern coast despite protests and long delays.

Takaichi's cabinet is pushing to strengthen Japan's own military presence on Okinawa and to work more closely with the U.S. military. Tokyo and Washington view the island, which lies about 100 kilometers (60 miles) from Taiwan at its closest point, as key to deterring military aggression from China. The killing could complicate the Henoko relocation, with opponents demanding the Marines leave the prefecture altogether.

"The Japanese government has always chosen the US-Japan alliance over the safety and lives, and voices of the people of Okinawa," Kozue Akibayashi, a professor of gender and peace studies at Doshisha University in Kyoto, told Al Jazeera. She said Okinawa accounts for about 1 percent of Japan's population and less than 1 percent of its territory, and has long faced discrimination within the country.

Okinawans have long complained about noise, pollution and crime connected to the bases, and criminal cases involving U.S. service members have strained ties between Japan's central government and the prefectural administration. Anger has also followed the delayed disclosure of some sexual crimes in recent years, including the rape of a teenage girl by a U.S. service member in 2024.

What is not yet known

Prosecutors have not filed charges, and police have not said publicly what relationship, if any, Ballard and Yagi had. Investigators are examining his movements before and after the killing and the nature of that relationship. The III Marine Expeditionary Force, which confirmed on Monday that Ballard was the Marine arrested, said it would not release further personal or administrative details, citing the integrity of the continuing investigation and privacy rules.

Glass said he and Watson discussed next steps in "strengthening that bond of trust with our Japanese partners and base-hosting communities."