For the first time in five years, a much-anticipated warm dessert is making its debut in the hot snack corner of the Japanese convenience store, FamilyMart. Its name is “Osatsu Ball.” Filled with the rich, autumnal flavor of sweet potato, this new treat will launch at FamilyMart stores nationwide on Tuesday, October 28, 2025. A pack of four will cost 230 yen (248 yen with tax). It is the perfect item to warm your heart and body as the weather turns chilly.
A Bite-Sized Taste of Autumn! The Craftsmanship Behind the “Osatsu Ball”
In recent years, sweets made with sweet potatoes have become a massive trend in Japan. Amidst this trend, the “Osatsu Ball” is a meticulously crafted product that FamilyMart is proud to launch. Its appeal lies in both its outer dough and the filling inside.
The Dough: A Chewy Texture That Endures Over Time
One of the product’s most distinct features is its unique texture. The dough is infused with purple sweet potato, giving it a beautiful, autumnal color. When you take a bite, you’ll experience a surprisingly chewy texture. A special process ensures this texture holds up well over time, which is a great bonus, as it remains delicious even if you don’t eat it right away. The subtle flavor of the purple sweet potato adds an extra layer of depth to the taste.
A Smooth Filling Made from Cured Sweet Potatoes
Inside the chewy dough, you’ll find a piping hot, melty, and gently sweet sweet potato filling. This filling is luxuriously made with “cured sweet potatoes,” which are stored for a period after harvesting to bring out their maximum sweetness. The potatoes are then carefully strained to create an incredibly smooth, melt-in-your-mouth texture. The natural sweetness of the sweet potato fills your mouth, offering a comforting and somewhat nostalgic flavor. Their bite-sized form makes them easy for anyone to enjoy.
The “Satsumaimo Sweets” Boom in Japan
So, why are sweet potato desserts getting so much attention right now? In recent years, their popularity has grown so much that specialized events like the “Satsumaimo Haku” (Sweet Potato Expo) are held across Japan. While baked sweet potatoes (yaki-imo) and sweet potato tarts were once the mainstream, the market continues to expand with a variety of new sweets that combine different textures, especially from specialty shops. The “Osatsu Ball” perfectly embodies this modern Japanese dessert trend by adding a new “chewy” texture to the traditional deliciousness of sweet potatoes. Japanese convenience stores are beloved by many for being places where you can easily enjoy high-quality products that quickly incorporate these latest trends.
When Is the Best Time to Enjoy Them?
“Osatsu Ball” is appealing for its convenience, making it perfect for various occasions. It’s an ideal snack to enjoy with coffee or tea during a break from work or study. Since it comes in a pack of four, it’s also great for sharing with friends and family. If you take them home, you can gently reheat them to enjoy that fresh-from-the-fryer, hot and chewy texture all over again. They are also satisfying as a light meal when you’re feeling a bit peckish, and their gentle sweetness is sure to soothe a tired mind and body.
This autumn, FamilyMart Japan is releasing the “Osatsu Ball.” As the first warm hot-snack dessert in five years, it’s already gathering a lot of attention. Why not experience this special, seasonal flavor that truly showcases the high quality of Japanese convenience store sweets? If you see them at a FamilyMart across Japan, be sure to pick them up and taste the craftsmanship for yourself.
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