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The big mistake that Sterns made when Grantville dropped into the war torn Germany of 1632, he let future data available to all. So now Spain is reluctant to accept how things might happen and concentrates on the Caribbean theatre as Dutch-English-USE explorers wrest pieces from them. Threats to the gold and silver galleons keeps the local governors busy.
So Japan tries to remove the christian coverts in several ways. They flee to the Philippines but the Dutch and Japanese Shogun pursue them there. But to North America they send colony ships with two plans. Establish Japanese settlements and isolate the christians. If these people die, then more true settlers can take their place. But should they survive, then all of the outlawed religion could be sent to isolate the faithful from these heretics.