The Dutch begin arriving around 1560-61 in the game (Sengoku Jidai campaign), beginning in the West, and working their way East as time passes. A port must be present for them to land and make their offer.

Heh, I guess one way to keep the Portuguese from bugging you is not to build any ports. If the cut to the Throne Room is what annoys you, just turn off the Throne Room in Options and you'll only get a dialog box, which is much less of an annoyance.

Been playing STW for a very long time, and have never seen a clan change back to Buddhism after turning Christian. I play WE, 1.02.

Just finished a Shimazu campaign today. Turned Christian almost immediately. Built Portuguese trading posts in Tosa and Owari. Once I built churches and a Cathedral the cash really started rolling in. Tosa and Owari also produce +1 honor Musketeers. The Dutch never showed up in this game, but I was playing a WE 1550 campaign (not the traditional Sengoku campaign).