The following is a list of the likely impact of and response to the devastating earthquake and tsunami that rocked the northeast coast of Japan on Friday, and subsequent crisis at nuclear power plants.
The death toll is expected to exceed 10,000, with northeastern prefectures of Miyagi, Iwate and Fukushima most severely hit. At least 3,570 people were confirmed dead, but 7,558 people are still missing, Japan's NHK public broadcaster says.
Number of people evacuated
*More than 440,000 people have been evacuated, NHK says. Hundreds of people are waiting for help in isolated areas and have no access to food.
Number of people without electricity, water
* About 850,000 households in the north are still without electricity in near-freezing weather, Tohuku Electric Power Co. says. The government says at least 1.5 million households lack running water.
Number of building damaged
* More than 76,000 buildings have been damaged, including at least 6,300 completely destroyed, NHK says.
Impact on economy
* Citigroup expects 5-10 trillion yen in damage to housing and infrastructure, while Barclays Capital estimates economic losses of 15 trillion yen ($183.7 billion) or 3 percent of Japan's GDP.
UBS expects Japan's economy to grow 1.4% in 2011, compared with its previous forecast of 1.5% expansion. But it upgraded its growth forecast for 2012 to 2.5%, up from the previous estimate of 2.1%.
* As concern about the crippling economic impact of the nuclear and earthquake disasters mounted, the Nikkei share average closed down 10.55% on Tuesday, while broader TOPIX share index lost 9.5% -- both the worst single-day slides since the global selloff after the Lehman Brothers collapse in 2008.
* The Tokyo Stock Exchange's first section, made up of the country's biggest companies, has lost about $626 billion in market capitalisation this week.
Number of countries offering aid
* According to Japanese foreign ministry, 102 countries and 14 international organisations have offered assistance. Teams from 14 countries/regions have arrived or already left for Japan. ($1=81.66 Yen)