Popular Taiwanese Castella with "Fluffy and Melty" Texture, Recreated with Authentic Methods and High-Quality Japanese Ingredients, Now Available at Shinjuku PePe! A Must-Queue Delicacy!

BOC Japan LLC (Headquarters: Minato-ku, Tokyo, Representative: Tomohiko Komatsu), which operates Taiwanese food franchises, will open a limited-time pop-up store for its Taiwanese castella specialty shop "Tairaku Tangao" at "Sweets Box" in Shinjuku PePe, directly connected to Seibu Shinjuku Station on the Seibu Shinjuku Line, from March 31 to April 6, 2026.

On March 12, 2021, amidst the COVID-19 pandemic, "Tairaku Tangao" opened at Tokyu Plaza Ginza. On its opening day, a long queue stretched all the way to Ginza Station, becoming a rare bright spot. Since the opening of the Tokyu Plaza Ginza store, we have received immense support from our customers, and the number of repeat customers continues to grow. We have been featured on numerous media outlets, including Nippon TV's "ZIP" and "Hirunandesu," Fuji TV's "Mezamashi TV," BS Asahi's "Teiban Times," and published in Yomiuri Shimbun, Sankei Shimbun, women's magazine "GINGER," "Hanako," and travel guidebooks.

At this pop-up event, we will sell popular plain Taiwanese castella, which faithfully reproduces the local taste and texture using authentic Taiwanese methods, as well as our featured burnt butter vanilla sugar, cheese, Earl Grey, and a total of six types of half-and-half sets, and cut castella in single-serving sizes.

Popular Taiwanese Castella with Long Queues

Taiwanese castella is a home-style sweet that has been popular in Taiwan for a long time, called "Xian Kao Dan Gao" (freshly baked cake). Cut into large pieces, its fluffy texture and subtle sweetness are perfect not only as a snack but also for breakfast.

"Tairaku Tangao" Taiwanese castella is characterized by its "fluffy and melty" texture, like a soufflé cake, baked slowly after mixing fresh egg yolks, milk, carefully selected flour, and meringue made from egg whites. The moist texture of the castella combined with the flavor of eggs and milk spreads a blissful taste throughout the mouth. Despite its large size, it has a melt-in-your-mouth texture that you never get tired of, making it a mysterious castella that you keep eating, and many people become repeat customers after just one bite.

For product development, specialist staff trained in Taiwan came to Japan to faithfully reproduce the local taste and texture using authentic Taiwanese methods, making it a genuine Taiwanese castella. It is a high-end Taiwanese castella that is meticulously crafted using authentic methods and high-quality Japanese ingredients. We hope you can experience a taste of travel with Tairaku Tangao's authentic Taiwanese castella.

▼Pop-up Outline

Exhibition Period: March 31 (Tuesday) - April 6 (Monday), 2026 Location: "Sweets Box" in Shinjuku PePe, directly connected to Seibu Shinjuku Station on the Seibu Shinjuku Line

Business Hours: 11:00 - 21:30

*Subject to the facility's operating hours

Open daily during the exhibition period *May be temporarily closed due to natural disasters, maintenance, etc.

▼Product Lineup

Premium Castella Series We offer carefully selected flavors using high-quality Japanese ingredients that can only be tasted at "Tairaku Tangao."

Premium Plain Plain castella with a fluffy and melty texture, baked slowly in a dedicated oven, with a mild taste that can be enjoyed by all ages.

Premium Cheese Rich cheddar cheese is sandwiched in the dough, and the surface is topped with Parmesan cheese powder, creating a fragrant texture and aroma. The exquisite combination of milky cheese flavor and moderate castella sweetness makes it a unique castella in Japan that cannot be tasted anywhere else.

Premium Uji Matcha With our unique baking method, the flavor of matcha is not lost, allowing you to enjoy the original taste of the ingredients. The taste of traditional Japanese matcha is realized with Taiwanese castella methods, resulting in a melt-in-your-mouth texture.

Premium Chocolate Cacao powder is kneaded into the dough and baked, then topped with chocolate chips. It is an impressive dish where you can enjoy the rich sweetness and bitterness of chocolate amidst the aroma of cacao.

Premium Earl Grey This luxurious item allows you to enjoy the rich aroma of Earl Grey by generously kneading tea leaves of flavored tea, scented with bergamot, a citrus fruit of the Rutaceae family, into the castella dough.

Premium Burnt Butter Vanilla Sugar The classic Premium Plain is condensed with butter flavor and topped with burnt butter, which has a rich sweet aroma. You can enjoy the luxurious aroma of vanilla sugar on top.

Half & Half Set A half-and-half set of Premium Plain and flavored castella.

Premium Cheese & Premium Plain A half-and-half set of cheese and plain. The Premium Cheese Castella has rich cheddar cheese sandwiched in the dough, and the surface is topped with Parmesan cheese powder, creating a fragrant texture and aroma. The exquisite combination of milky cheese flavor and moderate castella sweetness makes it a unique castella in Japan that cannot be tasted anywhere else.

Premium Cheese & Premium Uji Matcha

A half-and-half set of Uji Matcha and plain. With our unique baking method, the flavor of matcha is not lost, allowing you to enjoy the original taste of the ingredients. The taste of traditional Japanese matcha is realized with Taiwanese castella methods, resulting in a melt-in-your-mouth texture.

Premium Chocolate & Premium Plain A half-and-half set of chocolate and plain. The Premium Chocolate Castella has cacao powder kneaded into the dough and baked, then topped with chocolate chips. It is an impressive dish where you can enjoy the rich sweetness and bitterness of chocolate amidst the aroma of cacao.

Premium Earl Grey & Premium Plain A half-and-half set of Earl Grey and plain. The Premium Earl Grey Castella allows you to enjoy the rich aroma of Earl Grey by generously kneading tea leaves of flavored tea, scented with bergamot, a citrus fruit of the Rutaceae family, into the castella dough.

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 condensed with butter flavor in the classic Premium Plain and topped with burnt butter, which has a rich sweet aroma. You can enjoy the luxurious aroma of vanilla sugar on top.

Premium Quarter Series In response to customer requests such as "too big to eat alone" and "want to try various flavors," we offer the Premium Quarter Series, with 1/4 of a different flavor in each box.

Premium Quarter Plain / Cheese / Chocolate / Uji Matcha

Taiwanese Castella Pudding A new sensation Taiwanese castella sweet combining fluffy Taiwanese castella with pudding.

・Plain

・Uji Matcha

・Chocolate

・Earl Grey

*Sales products may change due to the pop-up event.

▼"Tairaku Tangao" Flagship Store Overview

Store Name: Tairaku Tangao GINZA NOVO (formerly Tokyu Plaza Ginza) Store

Location: GINZA NOVO B2F, 5-2-1 Ginza, Chuo-ku, Tokyo TEL: 03-6822-6188 Website: https://www.