Thank you for the link. Very informative.
I was born in Japan (father was in the US military) and have lived there off and on during my lifetime, most recently 2008 - 2010. I knew about the Portuguese influence on Tempura. The article did not talk about the other important influence from the Portuguese - baked goods such as bread and cake. Traditional Japanese cooking did not include the concept of an oven. Even to this day many home kitchens in Japan do not have an oven. My apartment in a brand new high-rise in Yokohama in 2008 did not have an oven - just a small broiler(fish grill) and three gas burners. Breads and cakes are very popular items to buy as gifts. When any of my co-workers would travel to Nagasaki for work they would always bring back some type of cake to share with the rest of us.