Nagasaki Castella: The Portuguese Sponge Cake That Became Japanese

Castella is the Nagasaki meibutsu that tells the story of the city better than most museums. A dense, sweet sponge cake brought by Portuguese traders, adopted, adjusted, and still baked by shops that opened in the 1600s.

A Foreign Cake That Never Left

Castella is a rectangular sponge cake made from eggs, sugar, flour, and starch syrup. It's moist, springy, and has crunchy zarame sugar crystals stuck to the bottom paper. That sugar layer is the detail that separates good Nagasaki castella from supermarket versions.

The name comes from the Portuguese pão de Castela, "bread from Castile."

Old Shopfronts and Hillside Streets

Nagasaki is hilly, compact, and layered with history: Chinese temples, Dutch trade sites, Catholic churches, and the atomic bomb memorials. Castella shops are scattered through the older downtown.

Some feel like museums: wooden storefronts, staff in uniforms, cakes wrapped like heirlooms. Others are modern, glossy chains. Same cake, very different feel.

Traders, Missionaries, and a Closed Country

Portuguese traders and missionaries arrived in the 16th century, and Nagasaki became their main port. When Japan later closed itself off, the Portuguese were expelled, and only the Dutch and Chinese could trade, through Dejima and the Chinese quarter.

The cake stayed. Fukusaya dates its founding to 1624, and Shooken to 1681. Over centuries, bakers adjusted the recipe with starch syrup for moistness, and castella became thoroughly Japanese.

Which Shop, and Why People Care

Locals have strong opinions about makers. Fukusaya, Shooken, and Bunmeido are the big historic names. Each has slight differences in sweetness, texture, and how much zarame sugar sits at the base.

Castella is a classic gift. It's what you take when visiting family or business contacts. Nagasaki people take the quality seriously because the cake is part of their city's identity.

Dancing Bears on TV

Castella's most famous pop culture moment is Bunmeido's long-running TV commercial with dancing bears and the jingle about castella being number one and the phone number being number two. Generations of Japanese viewers can still sing it. Note that Bunmeido has separate regional companies, but the commercials made the brand nationally famous.

Near the Castella Shops

• Fukusaya's main store: In Funadaiku-machi, near the Shianbashi entertainment district. An old wooden building with a classic bat logo.
• Shooken's main store: Near Megane Bridge, the double-arched stone bridge over the Nakashima River. Combine them in one walk.
• Castella offcuts: Look for kasutera no kirehashi, the trimmed edges. Many shops and markets sell them cheaply, and they're full of zarame sugar.

"Castella Is a Portuguese Cake"

It was, about 400 years ago. Modern Nagasaki castella is distinctly Japanese, and you won't find this exact cake in Portugal. Its Portuguese ancestor is closer to pão de ló. Castella is a Japanese descendant, not a museum piece.

Three Moves for Nagasaki

1. Buy smaller sizes. A full-size castella is heavy and meant for sharing. Half-size or sliced packs are easier to carry.
2. Eat it the next day. Castella is often said to taste better a day after baking, when the moisture settles.
3. Use the tram. Nagasaki's streetcar connects Dejima, Shianbashi, and Megane Bridge cheaply, so you won't waste energy climbing hills.