also: カステーラ
noun
castella; Japanese sponge cake
A sweet, moist sponge cake introduced by Portuguese merchants in the 16th century. Now a classic Japanese confection, often made with flour, sugar, eggs, and starch syrup.
from Portuguese pão de Castella
お土産に長崎のカステラを買った。
I bought some Nagasaki castella as a souvenir.
カステラはふわふわ
Castella is fluffy, sweet, and delicious.