Well the Portuguese were rather well received in Japan. They landed in 1543 and brought foreign goods, most notably guns. Many of the warlords around the area where the Portuguese landed were quite responsive to European trade, and Christianity. Christian churches were set up and many of the Japanese were converted to Christianity. The number I've seen is a quarter million. Many of the Daimyo (warlords) converted as well; partially to receive more favorable trade, partially out of actual religious conviction and partially to get cannons. I need to look this up but I believe the word the Japanese used for cannon literally meant "Earth destroyer" or something to that effect. One of the most powerful Daimyo, Oda Nobunaga, was actually pretty fond of Portuguese missionaries and would show them around his castle.

Edit: I was very close on the name for cannons. The word is kuni kuzushi and it means "country destroyer".