As the leaves begin to turn crimson and gold, Japan ushers in one of its most beloved times of year, sweet potato season, or "imo no kisetsu". This humble root vegetable, known as satsumaimo, is far more than a staple crop. It’s a nostalgic symbol of Japanese autumn, deeply tied to history, comfort, and culinary creativity.
A Brief History of the Japanese Sweet Potato
Sweet potatoes were first introduced to Japan from China in the early 18th century, quickly becoming a vital food source during times of famine. The island of Kyushu, particularly Kagoshima, played a major role in cultivating the crop, hence the name satsumaimo.
Over time, the sweet potato evolved from a survival food into a celebrated seasonal ingredient. Roasted sweet potatoes, or yaki-imo, became a familiar street-side delight, sold from trucks with their signature “yaki-imo~!” call echoing through crisp autumn streets.
Modern Love: Sweet Potato as a Seasonal Star
Today, satsumaimo takes center stage each autumn as countless Japanese brands and bakeries launch limited-edition sweet potato treats. From purple sweet potato lattes to sweet potato Mont Blancs and imo tarts, the flavor has become a marker of the season, much like pumpkin spice in the West.
You’ll find sweet potato featured in convenience store specials (Lawson, Family Mart, and 7-11 Japan release satsumaimo parfaits, mochi, and ice creams), cafés & patisseries (sweet potato cheesecakes, roll cakes, and lattes are autumn staples). Also, snack making companies like Calbee and KitKat Japan introduce limited-edition satsumaimo treats and snacks, capturing the earthy sweetness fans love.
This annual wave of sweet potato-inspired treats reflects Japan’s deep respect for seasonality (shun), a philosophy that celebrates ingredients at their natural peak.
A Sweet Note from Sakura Box
At Sakura Box, we’re just as enchanted by the cozy charm of Japan’s sweet potato season. That’s why our new Autumn/Winter 50 Piece Dagashi Sets include seasonal sweet potato snacks like imo filled wafers, gummies, & cookies. Each bite brings a taste of Japanese autumn straight to your doorstep.
Celebrate the season with us, and experience why Japan’s love affair with sweet potatoes is truly timeless.