Taiwan castella specialty shop Tairaku Tangao (台楽蛋糕) will hold a limited-time pop-up at "Kotsu Kaikan Marche," a one-minute walk from Yurakucho Station, from Saturday, October 24 to Sunday, October 25, 2026.
The pop-up offers castella baked with the methods used in Taiwan, reproducing the flavor and texture of the Taiwanese original. The lineup includes Premium Plain, three half-and-half sets, among them the Burnt Butter Vanilla Sugar and Earl Grey flavors, and cut castella in a size that is easy to finish in one sitting.
What Is Taiwan Castella?
Taiwan castella is a homestyle sweet long enjoyed in Taiwan, known locally as "現烤蛋糕" (Xian Kao Dangao), meaning "freshly baked cake." Cut into generous slices, it has a fluffy texture and a gentle sweetness that suits breakfast as well as an afternoon snack.
Tairaku Tangao opened at Tokyu Plaza Ginza on March 12, 2021, in the middle of the COVID-19 pandemic. A long line stretched all the way to Ginza Station on the Tokyo Metro on opening day, making it a rare piece of cheerful news at the time. Since then, the shop has gained many supporters and a growing number of repeat customers. It has been featured on Nippon TV's ZIP, Hirunandesu and 1 Oku 3000 Man-nin no SHOW Channel, Fuji TV's Mezamashi TV and BS Asahi's Teiban Times, and has appeared in the Yomiuri Shimbun, the Sankei Shimbun, the women's magazines GINGER and Hanako, and travel guidebooks.
A "Fuwaa Shuaa" Texture Made With Taiwanese Methods
Tairaku Tangao's Taiwan castella is made with plenty of fresh egg yolks, milk and carefully selected flour. Froth-like meringue made from egg whites is folded in, and the cake is baked slowly, giving it a soufflé-cake-like "fuwaa shuaa" texture. The moist batter carries the flavors of egg and milk. Although each piece is big enough to overflow both hands, the cake melts in the mouth and is easy to keep eating, which the shop says has turned many first-time customers into repeat buyers.
For product development, specialist staff who trained in Taiwan came to Japan and reproduced the local flavor and texture faithfully, using Taiwan's production method as is. The castella is made with high-quality Japanese ingredients. The shop hopes visitors will enjoy a taste of travel with its Taiwan castella.
Pop-Up Details
- Period: Saturday, October 24 to Sunday, October 25, 2026
- Location: Kotsu Kaikan Marche, Tokyo Kotsu Kaikan 1F, 2-10-1 Yurakucho, Chiyoda-ku, Tokyo (one-minute walk from Yurakucho Station)
- Hours: 11:30 AM to 5:30 PM (follows the building's hours)
- Closed: Open every day during the period (temporary closures may occur due to natural disasters, maintenance and other reasons)
Note: Products on sale may change because this is a pop-up.
Product Lineup
Premium Castella Series
The series features distinctive flavors made with high-quality Japanese ingredients.
Premium Plain
Baked slowly in a dedicated oven, this plain castella is fluffy and airy, with a mild, easygoing flavor that suits all age groups.
Half & Half Sets
Each set pairs Premium Plain with a flavored castella.
Premium Chocolate & Premium Plain
A half-and-half set of chocolate and plain. The Premium Chocolate castella is baked with cacao powder kneaded into the batter and topped with chocolate chips, offering the rich sweetness and bitterness of chocolate amid the aroma of cacao.
Premium Earl Grey & Premium Plain
A half-and-half set of Earl Grey and plain. The Premium Earl Grey castella is made by generously kneading flavored tea leaves into the batter. The tea leaves are scented with bergamot, a citrus fruit of the Rutaceae family, so the castella carries a rich Earl Grey aroma.
Premium Burnt Butter Vanilla Sugar & Premium Plain
A half-and-half set of burnt butter vanilla sugar and plain. The Premium Burnt Butter Vanilla Sugar castella is based on the classic Premium Plain, with the flavor of butter concentrated and topped with burnt butter that gives off a rich, sweet aroma. The vanilla sugar on top adds a luxurious fragrance.
Premium Quarter Series
Customers had asked for sizes that are not too big to finish alone and for a chance to try several flavors, so the Premium Quarter series puts a different flavor in each quarter of one box.
Premium Quarter: Plain / Cheese / Chocolate / Uji Matcha
Taiwan Castella Pudding
A new-style Taiwan castella sweet that combines fluffy Taiwan castella with pudding. Four flavors are available.
- Plain
- Uji Matcha
- Chocolate
- Earl Grey
Tairaku Tangao Store Information
- Store name: Tairaku Tangao (台楽蛋糕) Kawaguchi Factory & Cafe
- Address: 1-9-18 Maekawa, Kawaguchi, Saitama
- Hours: Weekdays 11:00 AM to 6:00 PM; weekends and public holidays 10:00 AM to 7:00 PM
- Closed: Mondays and Tuesdays
- Website: https://www.taiwancastella.com/
- Online shop: https://www.taiwancastella.shop/
