Japan 's southern regions of Okinawa, shikoku, and kyushu are home to the highest concentrations of centenarians.

百岁老人主要集中在日本南部的冲绳岛、四国岛和九州岛等地区。

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This week the SDF and U.S. Navy and Air Force launched a massive 16-day joint exercise off the southern islands of Kyushu and Okinawa involving 47, 000 men (10, 000 Americans), 30 ships, a U.S. carrier, and 240 aircraft.

FORBES: Is Japan Risking War to Save the U.S.-Japan Alliance?