Sony plans to resume production of Blu-ray and other optical discs at a tsunami-hit factory in northern Japan in late May, it said Thursday.

The company's Sendai Technology Center in the city of Tagajo is the only Sony plant still offline after a powerful earthquake and tsunami hit eastern Japan on March 11. Numerous factories of major electronics makers were halted after the quake but few were directly hit by the tsunami like the Sony plant was.

It was inundated with about 1.5 meters of water, mud and debris that caused heavy damage to the first floor of the building. A visit to the factory in late March found workers clearing out mud and crushed cars from the facility. That work has continued and now Sony is anticipating the restart of some operations.

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