Japan has a limited number of land-based shield elements (radius of ~20 mi) that are deployed rather sparsely; they're looking into purchasing Aegis Ashore, whi

Japan has a limited number of land-based shield elements (radius of ~20 mi) that are deployed rather sparsely; they're looking into purchasing Aegis Ashore, which is supposed to have greater coverage... for next year. I believe about seven destroyers in the Japanese navy are equipped with Aegis and can intercept; the 7th Fleet likewise, though not all of their destroyers are in Japanese territory at the moment (in fact, two of them were the ones in the news for crashes).