TOKYO (Reuters) - An earthquake with a preliminary magnitude of five struck eastern Japan on Sunday, public broadcaster NHK said.

       The epicentre of the earthquake was the southern part of Ibaraki prefecture, east of the capital Tokyo, NHK said. Witnesses saw the quake shake buildings in Tokyo, but there were no immediate reports of damage.

       (Reporting by Ju-min Park, Antoni Slodkowski; Editing by Richard Pullin)