Japan’s government said at least 11 people are confirmed dead and more than a million homes remained without power on Wednesday, as the country counted the cost of the most powerful storm to hit the mainland in 25 years.

Typhoon Jebi peeled roofs off buildings, flipped vehicles, toppled power poles and sent a 2,700 ton tanker crashing into the side of a bridge.

The operator of flooded Kansai International Airport, where around 3,000 tourists were stranded while the storm crossed over Japan, began transferring passengers by high-speed boat and bus to nearby Kobe port.

Typhoon Jebi: Extremely strong winds and heavy rain hit Japan Show all 20 1 /20 Typhoon Jebi: Extremely strong winds and heavy rain hit Japan Typhoon Jebi: Extremely strong winds and heavy rain hit Japan Vehicles damaged in Osaka Reuters Typhoon Jebi: Extremely strong winds and heavy rain hit Japan High waves hit breakwaters at a port of Aki AP Typhoon Jebi: Extremely strong winds and heavy rain hit Japan A tanker is seen after it slammed into the side of a bridge connecting the airport to the mainland AP Typhoon Jebi: Extremely strong winds and heavy rain hit Japan People walk against strong winds in Nagoya AFP/Getty Typhoon Jebi: Extremely strong winds and heavy rain hit Japan Kansai International Airport AP Typhoon Jebi: Extremely strong winds and heavy rain hit Japan Damaged traffic boards and telecommunication relay poles are seen after they were brought down by strong winds caused by typhoon Jebi in Osaka AFP/Getty Typhoon Jebi: Extremely strong winds and heavy rain hit Japan A tanker ship smashed into a bridge connecting the city of Izumisano with Kansai airport Western Nippon Expressway/Jiji Press/AFP/Getty Typhoon Jebi: Extremely strong winds and heavy rain hit Japan The forecast track of of Typhoon Jebi Japan Meteorological Agency/AP Typhoon Jebi: Extremely strong winds and heavy rain hit Japan A man looks at a truck overturned AP Typhoon Jebi: Extremely strong winds and heavy rain hit Japan A truck sitting at an angle after being blown over by strong winds on the Seto Ohashi bridge in Sakade Kagawa Prefectural Police/Jiji Press/AFP/Getty Typhoon Jebi: Extremely strong winds and heavy rain hit Japan A woman holds broken umbrella as a powerful typhoon hits Osaka AP Typhoon Jebi: Extremely strong winds and heavy rain hit Japan Containers fall near a port in Osaka, western Japan, following a powerful typhoon hit the region, in Tuesday, Sept. 4, 2018. A powerful typhoon blew through western Japan on Tuesday, causing heavy rain to flood the region's main offshore international airport and high winds to blow a tanker into a connecting bridge, disrupting land and air travel. (Kota Endo/Kyodo News via AP) Kota Endo AP Typhoon Jebi: Extremely strong winds and heavy rain hit Japan Boats float along with debris during Typhoon Jebi in Nishinomiya City Reuters Typhoon Jebi: Extremely strong winds and heavy rain hit Japan Police officers attempt to remove fallen trees AP Typhoon Jebi: Extremely strong winds and heavy rain hit Japan A tanker after it slammed into the side of the bridge connecting the airport to the mainland AP Typhoon Jebi: Extremely strong winds and heavy rain hit Japan Documents are spread under desks after windows broke at Gifu Prefectural Government in Gifu EPA Typhoon Jebi: Extremely strong winds and heavy rain hit Japan A police officer stands beside a flooded road AP Typhoon Jebi: Extremely strong winds and heavy rain hit Japan A tree damaged by Typhoon Jebi in front of Heian Shrine in Kyoto Reuters Typhoon Jebi: Extremely strong winds and heavy rain hit Japan Damaged vehicles blown by strong winds AFP/Getty Typhoon Jebi: Extremely strong winds and heavy rain hit Japan A building damaged by Typhoon Jebi in Osaka Reuters

One passenger was slightly injured by shards from a window shattered by the storm, and others said they were exhausted but relieved that the worst had passed.

Jebi has now been downgraded to a tropical storm, and is heading north of Japan. At its peak it was briefly a super typhoon, meaning wind speeds exceeded 150mph.

The tanker that was in the process of mooring had slammed into the side of a bridge connecting the airport to the mainland, damaging the bridge and rendering one of the two roads over it unusable, transport ministry official Mitsuo Nakao said.

The tanker was also damaged, but all its 11 crewmembers were not injured and rescued safely, according to the coast guard. The heavily damaged ship has been pulled away from the bridge into nearby open waters.

The tanker slammed into a bridge connecting Kansai airport to the mainland (AP)

The deaths included a man in his seventies who was blown to the ground from his apartment in Osaka prefecture. Police said five others died elsewhere in the prefecture after being hit by flying objects or falling from their apartments.

In nearby Shiga prefecture, a 71-year-old man died when a storage building collapsed on him, and a man in his seventies died after falling from a roof in Mie, officials said.

Daihatsu Motor Co stopped production at its Kyoto and Osaka factories, while Panasonic halted work at its air conditioning and refrigerator factory in Shiga. Major beverage maker Kirin Co suspended production at its brewery in Kobe, according to the Kyodo News agency.

In nearby Nishinomiya in Hyogo prefecture, about 100 cars at a seaside dealership burned after their electrical systems were shorted out by seawater, fire officials and news reports said.

Among the many buildings damaged by the storm was a world heritage site, the Nishi Honganji temple in the ancient capital Kyoto. According to national broadcaster NHK, the typhoon damaged a traditional theatre roof and other structures considered to be important cultural assets in the country.

In Osaka, the Universal Studios Japan theme park remained closed for a second straight day, though a news release said it would open again on Thursday.

Videos posted to social media during the storm showed the Tempozan Ferris Wheel, an Osaka landmark which was also closed, nonetheless spinning at high speed as it was caught in the wind.

Chief cabinet secretary Yoshihide Suga said in a news conference on Wednesday morning that about 300 people had been injured, a number which was doubled to 600 by officials later in the day. “The government will continue to do everything possible to tackle these issues with utmost urgency,” Suga told a news conference.

It could take several days to a week to reopen Kansai airport depending on the damage, the Yomiuri newspaper quoted an unidentified person in the airline industry as saying.

The airport served 28 million passengers last year, and that number is expected to grow as Japan opens up to tourism in recent years to keep its economy going. It serves Osaka, Kobe and Kyoto, all popular destinations for tourists.

Prime minister Shinzo Abe, criticised for an initially slow response to devastating floods in July, posted repeated updates on the rescue efforts at Kansai.