Hagibis was the worst storm to hit the country in decades, with some regions getting up to 3 feet of rain in just 24 hours.
A major rescue operation is underway in parts of central and northern Japan following the typhoon's landfall near Tokyo on Saturday.
Gregorio Kilili Camacho Sablan, the territory’s delegate to Congress, said residents will need significant help to recover.
At least 43 bodies have reportedly been recovered from a buried gold miners' bunkhouse in a remote Philippine town.
Philippine police say the death toll from Typhoon Mangkhut has climbed to 64.
Typhoon Mangkhut, the strongest storm to hit the country so far this year, is forecast to make landfall early on Saturday.
The tropical storm killed at least 16 people across China's southeastern coast.
Twenty-seven people have been reported missing.
The storm registered as a super typhoon, but has since weakened.
The storm also disrupted power supply and forced the cancellation of more than 600 flights.