Few Japanese sweets have as rich a history as castella (カステラ). Introduced by Portuguese missionaries and traders in the 16th century, this simple honey sponge cake became one of Japan's most beloved confections. Nagasaki, where Portuguese traders first arrived, remains the spiritual home of the finest castella.
What Is Castella?
Castella is a moist, dense sponge cake made from flour, eggs, sugar, and honey. Unlike Western sponge cakes, it contains no butter or oil — the texture comes entirely from well-beaten eggs. The result is a uniquely dense, slightly springy cake with a dark brown top surface glazed with honey and a characteristic bottom layer of coarse sugar crystals that provide a gentle crunch. It's sold in long rectangular slabs and typically cut into thick slices.
The Nagasaki Connection
When Portuguese traders arrived in Nagasaki in the 1540s, they brought pão de Castela — "bread from Castile" — which Japanese bakers adapted over centuries. The name castella is a Japanese phonetic rendering of "Castile." Nagasaki's isolation during Japan's sakoku (closed country) period paradoxically preserved this Portuguese influence while the rest of Japan was cut off from Western contact. Today, Nagasaki's castella shops are tourist landmarks.
The Best Castella Shops
Fukusaya in Nagasaki has been making castella since 1624 — over 400 years — making it one of the oldest confectionery businesses in Japan. Their cake is sold in iconic yellow boxes and is slightly more expensive than competitors but noticeably superior. Shooken and Bunmeido are also highly regarded Nagasaki producers. In Tokyo and throughout Japan, castella is widely available at depachika (department store food halls), souvenir shops, and online.
Varieties and Flavors
Traditional castella is plain (honey-flavored), but modern versions span many flavors: matcha green tea castella has become enormously popular, with its distinctive green color and slightly bitter counterpoint to the sweetness. Black sugar (kokuto) castella, particularly from Okinawa, has a deeper, molasses-like sweetness. Seasonal versions include sakura, yuzu, and sweet potato. Premium versions might use specific honeys — acacia, chestnut, or locally sourced varieties.
Castella as Souvenir
Castella is among Japan's most practical food souvenirs — it keeps for 2–3 weeks in its packaging, ships without refrigeration, and is universally appealing. A whole slab from Fukusaya (around ¥2,000–3,000) makes an excellent gift. Individual slices sold at depachika allow you to taste before committing to a full purchase.
Eating Castella
Slice castella thickly — at least 2 centimeters — and eat it at room temperature with green tea. The combination of slightly sweet, dense cake with bitter tea is one of those effortlessly harmonious pairings that defines Japanese café culture. Some people toast thin slices for a different texture experience, though traditionalists consider this sacrilege.
