Typhoon Lekima made landfall early on Saturday in China's Zhejiang province, with winds gusting up to 187 kmh (116 mph). The centre of the storm has since travelled north through Shandong and off the coast.
The National Meteorological Centre warned that 24-hour rainfall levels across eastern China could reach around 250-320 millimetres from Friday afternoon to Saturday afternoon.
About 900 mm of rain has fallen on the southernmost main island of Kyushu since late June, with heavy rain forecast to continue into Thursday.
Officials say the casualties occurred when rain-triggered landslides collapsed homes in several provinces in central Philippines, adding 20 people still remain unaccounted for.
Typhoon Trami has already disrupted travel in the world's third-biggest economy, with bullet train services in the west of Japan suspended, over 1,000 flights cancelled due to the closure of a key airport and Tokyo's evening train services scrapped.
Officials fear more deaths, including two who sent text messages seeking help, in the collapse that buried about 30 houses in two villages after daybreak in central Cebu province.
Millions of people are at risk from a strong typhoon set to smash into the northern Philippines this weekend which could bring floods, landslides and huge waves to the disaster-prone nation.
Jebi, briefly a super typhoon, is the most powerful storm to hit Japan in 25 years. More than a million homes were without power and Kansai airport officials started to transfer some 3,000 stranded passengers by boats after its runways were flooded.
Maria was expected to make landfall late on Tuesday, hitting Taiwan's northern region the hardest.
Officials said the tropical storm in the south of the country unleashed flash floods that swept away people and houses and set off landslides, leaving at least 153 people missing.
Typhoon Damrey kills at least 106, leaving 25 missing and 197 injured in Vietnam, according to country's search and rescue committee.
More than 100,000 houses nationwide are still under water, at least four children were among the dead while two more are missing.
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