Workers unload a container from a cargo ship at a port in Tokyo April 1, 2010. Japanese business morale improved to the highest in more than a year but companies remain cautious about spending, a Bank of Japan survey showed, suggesting the government will not let up in its calls for more monetary easing. REUTERS/Kim Kyung-Hoon (JAPAN - Tags: BUSINESS)

Japan's flag is seen over containers on a cargo ship at a port in Tokyo April 1, 2010. Japanese business morale improved to the highest in more than a year but companies remain cautious about spending, a Bank of Japan survey showed, suggesting the government will not let up in its calls for more monetary easing. REUTERS/Kim Kyung-Hoon (JAPAN - Tags: BUSINESS)

Indonesian habour workers protest at Jakarta's main Tanjung Priok port November 9, 2000, demanding for higher pay. The protest stalled port operation including the unloading of containers shipped by various cargoships.

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