(original photo by Toshihiro Oimatsu; CC BY 2.0)

Extreme Weather

Tokyo is especially prone to severe weather conditions, including typhoons, heavy rains, windstorms and snow. In the event of such conditions it is important to safeguard against injury and damage caused by strong winds, slippery roads and flying debris. Additionally, severe weather can cause delays and stoppages to transportation systems and create dangerous driving conditions.

The kisho-cho (, Japanese Meteorological Agency, abbr. JMA) provides up-to-date regional weather forecasts and analyses, precipitation “nowcasts,” news releases, and earthquake, tsunami, and volcanic eruption warnings in English.

Typhoons and Heavy Rain

The typhoon season in Japan is from August through October, so it is important to be aware of the hazards of strong winds and heavy rains. During heavy rainfall precipitation can exceed 100mm per hour, overwhelming the drainage capacity of flood control centers. Below are some guidelines to minimize damage and injury.

  • Close and lock windows securely. Move anything indoors that is breakable or that can be caught in a wind gust including plants, pots, and patio furniture.
  • If you have a basement room accessible from outside, block the door and do not go inside.
  • Check the TV or radio for updated weather reports and road conditions. Find out beforehand where English news is broadcast.
  • Blackout and water outage can occur in the worse cases. Prepare water supplies and flashlights in advance.
  • Beware of flying debris when outdoors.
  • Stay away from rivers and waterfronts.
  • In the case of heavy rain, avoid using underground facilities.


It is unusual for snowfall in Tokyo to continue for more than a few days. While deep snow is unlikely in Tokyo, slips and falls due to frozen roads remain a significant danger. Additionally, since public transportation in Tokyo is ill-prepared for snow, train and bus delays and stoppages can be severe.

See also: our featured article: “Things to Know about Winter Driving in Japan ”.

Dust Storms (Yellow Sand)

On occasion, kōsa (, yellow sand) from the Gobi Desert and other parts of the Asian continent is carried carried to Japan by spring wind currents, appearing in Japan as a form of visibility-obstructing dust storm or smog. Recent studies have found that Aeolian dust may contain high concentrations of ultrafine particulate matter known as PM 2.5 and contaminants that may result in adverse health effects. While the impact in Japan is much less severe than its area of origin in Mongolia and China, precautions such as wearing a mask and keeping doors and windows shut are advised on days of heavy dust concentration.

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