Japan’s iconic “Black Thunder” chocolate series is breaking tradition with a bold new release. Starting April 7, 2026 (Tuesday), the “Strawberry Thunder Bite-Size: Strawberry Intensity Over 200%” will be available exclusively at convenience stores (konbini) across Japan. This marks the very first time a flavor other than chocolate has been introduced to the “Over 200%” series, which is known for its pursuit of ultimate satisfaction.
Intense Flavor in Every Bite! The “Over 200%” Series Reaches a New Stage
Currently, the “Black Thunder Bite-Size” series enjoys unshakable popularity in Japanese convenience stores. This series has captivated fans with its powerful catchphrase, “Chocolate Intensity Over 200%.” Now, for the first time, a new flavor joins the lineup: Strawberry.
According to the manufacturer, Yuraku Confectionery, the goal of this development was to expand the unique value of providing “overwhelming satisfaction even in a bite-sized format.” They chose strawberry as the featured ingredient because it allows consumers to directly experience a “depth” of flavor through its distinct aroma, acidity, and vibrant color.
The phrase “Strawberry Intensity Over 200%” signifies that this product achieves an overwhelming richness compared to the company’s existing “Strawberry Thunder Mini Bar.” This release promises a starring-role flavor that sets it apart from conventional strawberry chocolate snacks.
The Secret is the Double Strawberry Blend! A Golden Balance of Tartness and Sweetness
The standout feature of this new release is the luxurious use of two different types of strawberry ingredients. This is far more than just strawberry-flavored chocolate.
- Strawberry Chips: These provide a fun, crunchy texture and act as an accent that asserts the strawberry’s presence with every bite.
- Freeze-Dried Strawberry Powder: This highlights the natural sweet-and-sour profile and vivid red color of the fruit, creating a multi-dimensional flavor.
By blending these generously, the snack is designed to deliver not just natural sweetness, but also a refreshing acidity. The rich aroma that spreads the moment you eat it offers a dense experience truly worthy of the “200%” name.
The Secret to the “Zaku-Zaku” Crunch: Adopting the “Basic Cookie”
The hallmark of Black Thunder is its substantial, “Zaku-Zaku” (extra crunchy) texture. For this new product, extraordinary care was taken to harmonize this signature crunch with the strawberry flavor.
To maximize the delicate yet powerful strawberry flavor, the developers chose the “Basic Cookie”—one of their simplest-tasting in-house cookies. By opting for a cookie that plays a supporting role rather than one with a strong individual personality, they maintained the satisfying “Black Thunder” bite without compromising the overwhelming strawberry sensation.
While keeping the unique texture created by the combination of biscuits and cookies, the finish brings the strawberry intensity to the forefront. Despite its convenient bite-size, the satisfaction gained from a single piece is incredibly high, making it perfect for a quick refresh during work or as a personal treat.
Visual Impact! Vibrant Red Packaging to Make the Strawberry Pop
The effort extends beyond taste to the package design, which is crafted to catch the eye on Japanese convenience store shelves. Various elements ensure that the main selling point—”Strawberry Intensity Over 200%”—is communicated at a glance.
The text “Over 200%” is boldly placed in the center of the package, set against a visual of bright red strawberries piled like a mountain. the vivid red-based color scheme visually represents the richness of the contents.
Even in the crowded snack aisles of Japanese konbini, this high-impact packaging is sure to be easily found. The design allows you to feel the world of intense strawberry from the moment you pick it up.
Check the Release Info and Product Lineup
Here is a summary of the new release and the classic product currently available. Both are exclusive to convenience stores across Japan, so we recommend trying both to compare!
Strawberry Thunder Bite-Size: Strawberry Intensity Over 200%
- Release Date: April 7, 2026 (Tuesday)
- Price: 149 yen (approx. $0.99 USD)
- Net Weight: 1 bag / 39g (approx. 1.38 oz)
- Availability: Exclusive to convenience stores across Japan
- Features: The first flavor expansion for the series. Features a rich taste driven by strawberry chips and powder.
Black Thunder Bite-Size (Standard)
- Availability: Currently available exclusively at convenience stores across Japan
- Price: 129 yen (approx. $0.86 USD)
- Net Weight: 1 bag / 43g (approx. 1.52 oz)
- Features: A long-selling favorite known for its overwhelming chocolate satisfaction and signature “Zaku-Zaku” crunch.
Grab This Rich Experience Exclusive to Japanese Convenience Stores
Yuraku Confectionery’s “Strawberry Thunder Bite-Size: Strawberry Intensity Over 200%” is a product with the potential to redefine the standard for strawberry chocolate snacks. It is the culmination of the development team’s trial and error, resulting in a perfect pairing of double strawberry ingredients and a meticulously calculated cookie blend.
Starting April 7, be sure to check the snack section whenever you stop by a Japanese convenience store like 7-Eleven, Lawson, or FamilyMart. This new release, marked by its vibrant red packaging, is sure to provide an unforgettable, intense taste of spring.
Since this is expected to be a highly talked-about product, we recommend checking it out early. Enjoy the new world of “Over 200%” that Black Thunder is pioneering!
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