Chief Cabinet Secretary Yoshihide Suga said no one was left on a missing list, which suggested the figure could be the final death toll.
Around 40,000 police, fire fighters, troops and maritime safety officials were providing assistance, with more than 2,700 people still forced to stay in shelters after the killer quake struck the northern Japanese island of Hokkaido last week.
Toll from Japan quake rises to 18 as hopes fade for survivors
The majority of the dead are from the small rural town of Atsuma, where a cluster of dwellings were wrecked when a hillside collapsed from the force of the 6.6-magnitude quake, causing deep brown scars in the landscape.
Osaka's win gives disaster-struck Japan rare good news
"The government will strive to get hold of what is needed on the ground and take every possible measure so that people can return to a normal, safe life as soon as possible," Suga told a news conference.
He also warned that islanders should remain on alert as rainfall was forecast in the region, which could trigger fresh landslides.
The quake was the latest in a string of natural disasters to batter the island nation.
Powerful quake kills at least four, paralyses Japan's Hokkaido
Western parts of the country are still recovering from the most powerful typhoon to strike Japan in a quarter of a century, which claimed 11 lives and shut down the main regional airport.
Launching a campaign for another term as head of his ruling party, Prime Minister Shinzo Abe reiterated his government will "do its best" to restore the disasters-hit regions.
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