A new product that brings out the maximum flavor of matcha, “Ko-Matcha Thunder,” is joining the popular Japanese chocolate snack series “Black Thunder.” The release date is Tuesday, March 17, 2026. It will be available simultaneously at major Japanese convenience stores (konbini) like 7-Eleven, Lawson, and FamilyMart, as well as supermarkets and drugstores nationwide.
In the Japanese chocolate market, matcha is an incredibly popular flavor. In 2025 specifically, products with the keyword “Rich” or “Intense” dominated the hit charts. This new release was developed to meet the strong demands of these dedicated matcha fans.
A Deep Flavor and Lingering Finish Created by Two Types of Uji Matcha
The standout feature of this product is the luxurious blend of two types of “Uji Matcha,” which is world-renowned as a high-quality tea from Kyoto. By combining matcha with different characteristics, they have achieved a complex and deep taste profile.
Specifically, they have blended matcha known for its strong “sweetness and umami” with an “astringent” matcha that provides a clean aftertaste, all in an exquisite ratio. This “golden ratio” was finalized after the development team went through countless trials to pursue the perfect balance of sweetness, umami, and bitterness.
Furthermore, it’s not just matcha powder; “matcha-flavored chips” are also kneaded into the dough. These chips, made with domestic Japanese matcha, cause a burst of intense matcha aroma in your mouth with every bite. You can enjoy the deep, lingering finish of matcha from the first bite to the last.
The Secret of the Newly Developed “Basic Cookie” to Highlight the Matcha
The charm of Black Thunder lies in its unique “crunchy” (zakuzaku) texture. For this “Ko-Matcha Thunder,” a new “Basic Cookie” was uniquely developed to replace the traditional cocoa biscuits, ensuring that the delicate flavor of the matcha remains the star of the show.
These plain-flavored cookies play the role of adding a pleasant texture without interfering with the taste of the matcha.
Additionally, as a clever way to balance the flavors, the bitter chocolate coating is applied to the “bottom side only.” This structure allows the matcha aroma to spread as you eat, while the bitter chocolate provides an elegant finish at the end. It is truly a masterpiece that can be called an authentic Japanese sweet.
Details on Release Date, Price, and Availability
The basic information for “Ko-Matcha Thunder” is as follows:
- Product Name: Ko-Matcha Thunder
- Content: 1 bar (Standard size)
- Suggested Retail Price: 86 yen (including tax / approx. $0.57 USD)
- Release Date: Tuesday, March 17, 2026
- Sales Area: Convenience stores, supermarkets, drugstores, etc., throughout Japan
Despite its affordable price of 86 yen (approx. $0.57 USD), it features an authentic recipe using luxurious Uji Matcha. The vibrant deep-green packaging, commonly found in Japanese convenience stores, is perfect as a “small treat” for yourself.
Why not experience the evolved “intensity” of matcha for a change of pace during the busy end-of-the-fiscal-year season? We recommend checking the March 17 release date and looking for it at a store near you.
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