In her message to Japan`s Emperor Akihito, the queen said: "I was saddened to hear of the tragic loss of life caused by the earthquake which has struck northeast Japan today.
"Prince Philip joins me in extending our heartfelt sympathy to your Majesty and the people of Japan. Our prayers and thoughts are with everyone who has been affected by the dreadful disaster."
Prince Charles, the heir to the throne, said he had heard the news of the devastating quake and the tsunamis it generated with "the greatest shock and sadness."
In his own message to the emperor, Charles said: "You are constantly in our thoughts and prayers at this most dreadful and challenging of times."
Foreign Secretary William Hague said Britain stood ready to send humanitarian assistance and search and rescue teams to the quake zone.
The Foreign Office also advised British nationals to avoid all non-essential travel to Tokyo and the north-east of Japan "whilst we assess the damage caused", a statement said.(*)
Editor: Jafar M Sidik
Copyright © ANTARA 2011
