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This picture taken on November 24, 2015 shows coast guard officials investigating a wooden boat at the Fukui port in Sakai city in Fukui prefecture, western Japan after the ship was found drifting off the coast of Fukui. Japan is investigating nearly a dozen suspicious boats recently found drifting off the country's coastline, some with decaying bodies aboard, officials said on November 27, as media speculated they came from North Korea. At least 11 cases involving wooden boats -- some badly damaged -- with 20 bodies on board have been reported during October and November. AFP PHOTO / JIJI PRESS JAPAN OUT / AFP / JIJI PRESS / JIJI PRESS (Photo credit should read JIJI PRESS/AFP/Getty Images)

This picture taken on November 24, 2015 shows coast guard officials investigating a wooden boat at the Fukui port in Sakai city in Fukui prefecture, western Japan after the ship was found drifting off the coast of Fukui. Japan is investigating nearly a dozen suspicious boats recently found drifting off the country's coastline, some with decaying bodies aboard, officials said on November 27, as media speculated they came from North Korea. At least 11 cases involving wooden boats -- some badly damaged -- with 20 bodies on board have been reported during October and November. AFP PHOTO / JIJI PRESS JAPAN OUT / AFP / JIJI PRESS / JIJI PRESS (Photo credit should read JIJI PRESS/AFP/Getty Images)
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