While the vast majority of Japan’s population is crammed onto its four largest islands, Honshu, Kyushu, Shikoku, and Hokkaido, the country’s territories extend much farther out to sea. For example, if you head about 1,000 kilometers (621 miles) south of downtown Tokyo, you’ll come to the Ogasawara Islands, one of Japan’s most remote settlements.

We’ve talked about the Ogasawaras before, and how their beautiful ocean scenery has been helping to attract tourists (and perhaps even a new chef), to the archipelago. Recently, though, the islands have been seeing an increasing number of extremely unwelcome visitors, in the form of ships coming from China to poach coral.

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