A group from Otsuchi town in Iwate Prefecture, the worst hit by the disaster, perform a Tiger Dance at the Japanese Embassy in London. The Fukokai Society lost many of its members, including its chairman and many of its props were destroyed.
A year after the biggest earthquake to hit Japan the country remembers the events of that terrible day.
Experts disagree about how long it will take to clean up after Fukushima - it could easily be decades. But why did it happen at all?