If you are following the news, you know that there is a big spat going on between Okinawa's Governor Onaga and the Abe administration about the relocation of a base in Henoko. It seems that some of the gravel, etc that will be used to reclaim land for the project is likely to come from Amakusa.

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“It is a business opportunity,” said a senior official with the Kumamoto prefectural confederation of operators of quarries, although he said landing such a deal is far from guaranteed. “To some operators, it could represent the bulk of their sales in value.”
Goshourajima island in Amakusa, Kumamoto Prefecture, is widely seen as a prospective site for supplying dirt for the base.
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http://ajw.asahi.com/article/behind_news/social_affairs/AJ201506010067