Datemaki (a rolled omelet mixed with fish paste), a familiar osechi food (special food for New Years in Japan), is often put out as Suzuributa, since the texture and the manufacturing method is very similar to that in Nagasaki, which is called 'sponge cake boiled fish paste' and it seems that the relationship among these three is high.
ちなみに、御節料理としてお馴染みの伊達巻も硯蓋でよく出された料理といわれ、長崎では食感や製法の類似性から「カステラかまぼこ」とも呼ばれており、この三つの関連性は高いと思われる。