As winter arrives in Japan, a new delight is appearing on convenience store shelves. From the beloved Black Thunder chocolate bar series comes a new product pursuing a deep, rich flavor: “Black Thunder Blissful Gianduja.” Themed around the traditional Italian confection “gianduja,” it’s the perfect treat for the winter season.
Black Thunder is a popular snack known for its signature crunchy “zakuzaku” texture, made with cocoa cookies and biscuits coated in chocolate. Its affordability and satisfying nature have earned it a wide fan base, from children to adults. It’s no exaggeration to call it a “national snack” in Japan, as it is a familiar presence for many. This time, Black Thunder is launching a slightly more luxurious, premium version inspired by the flavors of a specialty chocolate shop.
A Rich and Decadent “Gianduja” Flavor Perfect for Winter
The theme of this new release, “gianduja,” is a traditional chocolate originating from Northern Italy, made by mixing a paste of roasted hazelnuts with chocolate. It is characterized by a rich flavor where the fragrant aroma of nuts and the sweetness of chocolate melt together perfectly.
“Black Thunder Blissful Gianduja” was developed to make this authentic flavor easily accessible. It’s not just about the sweetness of the chocolate; the addition of the fragrant richness of browned butter and the subtle bitterness of coffee powder as secret ingredients provides depth and complexity to the flavor. With just one bite, you’ll experience a “blissful” moment, as if you were savoring a dessert from a specialty shop.
An Evolved “Zakuzaku” Texture! A Multi-layered Harmony of Five Ingredients
The charm of Black Thunder is, without a doubt, its “zakuzaku” crunchy texture. In this new creation, that texture has evolved even further.
Candy-coated hazelnuts, crispy feuillantine (crushed thin crepe pieces), whole wheat biscuits, butter-flavored cookies, and cocoa biscuits. These five different ingredients are intricately layered, offering a new textural discovery with every bite. The multi-layered, crunchy “zakuzaku” texture created by these components within the rich gianduja chocolate is sure to be addictively delicious.
Two Types of Hazelnuts Blended in a “Golden Ratio”
An extraordinary level of care has gone into the hazelnut paste that forms the core of this product’s flavor.
After much trial and error, the development team arrived at blending two types of hazelnut paste—one with skin and one without—in a “golden ratio.” The skin-on nuts provide a fragrant aroma and depth of flavor, while the skinless nuts offer a smooth, creamy texture. The exquisite harmony of these two brings out the maximum rich and dense flavor unique to gianduja.
Furthermore, by adding carefully roasted and crushed hazelnuts coated in candy, the natural flavor of the nuts is sealed in, creating a fragrant aroma that fills the mouth and a luxurious aftertaste.
Product Information and Release Schedule
The luxurious packaging design also enhances the indulgent winter mood. Based on a matte gold color scheme with a design that evokes the rich flavor of hazelnuts, it is sure to stand out on store shelves.
Product Name
Black Thunder Blissful Gianduja
Suggested Retail Price
64 JPY (tax included)
Release Date
An advance release will begin at convenience stores nationwide in Japan on Tuesday, December 2, 2025. Following that, it will be available at supermarkets, drugstores, and other retailers starting Monday, January 12, 2026.
In Japan, it is common for convenience stores to be the stage for “advance releases” of new products. This is an interesting feature of Japanese retail culture, making convenience stores a must-check spot for those who want to try new things as soon as they’re out.
Summary
“Black Thunder Blissful Gianduja” retains the familiar appeal of the classic Black Thunder while adding a rich, specialty-shop-like flavor, making it the perfect treat for a winter indulgence. If you come across it in a convenience store or supermarket during your stay in Japan, be sure to pick one up. This small winter luxury from Japan might just make your travel memories even more special.
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