China's copper imports from Japan increased by almost one third in November. Copper cathodes imports rose by 40% to 44,532 tonne while imports of refined copper soared by 35% to 46,278 tonnes. China took advantage of lower copper prices; LME Copper decreased from $10,000/tonne in the beginning of 2011 to $8000/tonne. Arbitrage opportunities between London and Shanghai exchanges also supported demand of copper.