Peter Voser
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Shell 'Co-ordinating with Japanese' says CEO Peter Voser

Japanese shares have tumbled again, as worries spread about the impact of the quake.

The Nikkei Index ended the day more than ten percent down. It's the biggest one-day fall since 2008, at the start of the global financial crisis.

Markets across Asia also fell sharply.

Shell's Ceo Peter Voser told the BBC that the company - which has has a sizable energy business in Japan - is working with the Japanese government to help with their energy needs