Typhoon Ampil bore down on Tokyo on Thursday, prompting airlines to cancel hundreds of flights and railways to suspend part of their operations in the peak summer travel season.
The typhoon, categorised as "strong" by the Japan Meteorological Agency (JMA), was about 690 kilometres off Japan's Pacific coast at 9:00 a.m. (0000 GMT on Thursday), heading towards Tokyo and surrounding regions. The agency has two higher categories - "very strong" and "violent".
Ampil was blowing winds of 125 km/h, with maximum gusts of 180 km/h, according to the JMA.
"With this typhoon approaching, we urge the public to be highly vigilant against storms, high waves and heavy rains," a JMA official told a news conference.
Japan Airlines said it planned to cancel 191 domestic and 26 international flights, many of them leaving or arriving at Tokyo's Haneda airport, on Friday.
Another major airline, ANA, announced it would cancel 280 domestic flights that were originally slated for Friday, affecting more than 60,000 passengers.
Central Japan Railway said it would cancel all the Shinkansen bullet train services between Tokyo and Japan's industrial heartland of Nagoya on Friday.

Tanzania's Hassan declared landslide winner in election marred by violence
Vietnam's ancient town Hoi An works to restore tourism after devastating floods
Indian temple stampede kills nine, injures several
Turkey to host Gaza meeting amid ceasefire concerns
Tanzania opposition says hundreds killed in vote protests
Turkey sentences 11 people to life in prison over ski resort hotel fire
China sends its youngest astronaut to 'Heavenly Palace' space station
Israel launches more strikes on Gaza overnight, testing fragile truce
