The death toll from Friday’s devastating earthquake and tsunami that hit northeastern and eastern Japan will likely surpass 10,000, the Miyagi police chief said Sunday.

The magnitude of the country’s biggest recorded quake was revised upward the same day from 8.8 to 9.0, making it one of the largest in history in the world, the Japan Meteorological Agency said, adding that a major aftershock is still quite likely while removing its tsunami alert for the archipelago.

‘‘We have no choice but to deal with the situation on the premise that it (the death toll) will undoubtedly be numbered in the ten thousands,’’ Naoto Takeuchi, head of the Miyagi prefectural police, said in a local disaster task force meeting.

The death toll confirmed by police topped 1,000 in Miyagi and other areas in the evening, excluding more than 600 bodies that have been found in Miyagi and Iwate prefectures on the Pacific coast.

Also, local governments have been unable to contact tens of thousands of people, and at least 20,820 buildings have been fully or partially damaged in quake-hit areas.

Prime Minister Naoto Kan issued an instruction early Sunday to boost the number of Self-Defense Force personnel sent to quake-hit areas to 100,000, one of the largest for an SDF operation, Defense Minister Toshimi Kitazawa said.

‘‘I would like to ask for maximum efforts in order to save the lives of as many people as possible,’’ Kan told a morning meeting of the cabinet-level emergency disaster headquarters held at his office. ‘‘We will do everything to rescue stranded people.’‘

The SDF had dispatched 65,000 personnel by Saturday night, but will increase the number to 100,000 in one or two days, Kitazawa told reporters.

In Miyagi, about 200 more bodies were found in the city of Higashimatsushima, and about 10,000 people in Minamisanriku, over half the town’s population, remain unaccounted for, police said.

About 4,400 people remained isolated as of Saturday night in the tsunami-swamped town of Onagawa and neighboring Ishinomaki city, in schools, hospitals, inns and the Onagawa nuclear plant where they had been evacuated to, Miyagi officials said.

In Iwate Prefecture, north of Miyagi, many bodies were found Sunday morning under the rubble in Rikuzentakata, and the U.S. military in Japan is poised to airlift about 640 isolated residents there by eight helicopters, the police and the Defense Agency said.

About 5,000 houses in the city had been submerged by quake-triggered tsunami, and the city office has confirmed that only 5,900 of its population of about 23,000 had taken shelter.

The Iwate government also said it has been unable to communicate with the mayor and officials in Otsuchi after the town office was swept away by a tsunami while the mayor and town officials were apparently inside the building. A nursing home accommodating 30 elderly people was also washed away in Ofunato city.

The Fukushima prefectural government said it was still unable to contact 1,167 residents, including 918 in the town of Namie, boosting the tally of those unaccounted for in its latest data.

Helicopters from the Maritime Self-Defense Force sent to check the extent of damage spotted bush fires at seven places in Miyako city early Sunday, the Defense Agency said.

Communication failures were also found to have extended further. Nippon Telegraph and Telephone East Corp. said 475,400 fiber-optic services were disconnected as of 6 a.m., up 76,500 from 8 p.m. Saturday, in addition to 879,500 subscribed phone lines that remained out of service in areas centering on Iwate and Miyagi.

A total of 11,400 base stations of major cell phone operators NTT Docomo Inc, KDDI Corp and Softbank Mobile Corp. stayed inoperative as of 7:30 a.m., disrupting phone calls and emails via mobile phones across wide areas, the Internal Affairs and Communications Ministry said.

Areas in Iwate, Miyagi and seven other prefectures remained unable to receive TV signals as of 10 a.m., it also said.

Ground SDF troops, meanwhile, rescued about 5,800 people in the Miyagi town of Kesennuma and its vicinity, the Defense Ministry said.

In the evening the weather agency lifted the tsunami advisory that remained for the Pacific coast stretching from Hokkaido to Kyushu after downgrading its tsunami warning to an advisory in the morning for the Pacific side of the Tohoku region in northeastern Japan.

Meanwhile, a Maritime Self-Defense Force destroyer rescued a 60-year-old man from the sea some 15 kilometers off Fukushima Prefecture on Sunday after massive tsunami swept coastal regions following a magnitude 9.0 earthquake on Friday.

The man, identified as Hiromitsu Shinkawa from the city of Minamisoma, was spotted floating in sea on a piece of roof around 12:40 p.m. after being swept along with his house, the Defense Ministry said.

He is conscious and in good condition, ministry officials said, adding he was transported to a hospital by helicopter.