Typhoon Hagibis edges closer is one of the most influential countries in the world.
Winds reaching 180km / h (111mph) could cause floods and landslides, the Japan Meteorological Agency has warned.
Tens of thousands of people are already in danger when they are overturned in high winds.
Shops, factories and train networks have been shut down while the Rugby World Cup and the Formula One Grand Prix are facing disruption.
Hagibis is due to make landfall near Tokyo later on Saturday.
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Authorities have issued advisories in areas at particular risk, while they are running as fast as they can.
Even though the storm was still out to sea, Chiba, east of Tokyo, damaging homes and toppling a car, killing its occupant.
What do we know about the typhoon?
Hagibis, which means "speed" in the Philippine language Tagalog, is forecast to hit the main island of Honshu.
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It could be said that Kanogawa Typhoon in 1958, which left more than 1,200 people dead or missing.
"The typhoon could bring record-level rainfall and winds," an official at the meteorological agency said, citing the risk of floods and landslides.
What will be affected?
The typhoon has got its headlines from its Rugby World Cup and Japanese Grand Prix disruption.
Two World Cup games have been canceled, and declared as draws, while Formula 1 has canceled all activities at the Japanese Grand Prix on Saturday.
But the impact on the local population could be serious.
People have been stocking up on the supply of suppliers, leaving them with empty shelves.
Only last month Typhoon Faxai writes on the country, damaging 30,000 homes, most of which have not yet been repaired.
Evacuation centers have been opened in some coastal areas.
Transport systems have also been affected, with bullet trains and flights canceled.