As autumn arrives in Japan, Starbucks and Tully’s Coffee have launched limited-edition sweet potato drinks. Starbucks’ Yaki-imo Frappuccino and Tully’s Oimo Tea Shake offer distinct flavors, delighting customers with a seasonal twist. Which coffeehouse does sweet potato better? Here's the full taste comparison.
Starbucks and Tully’s Unveil Competing Sweet Potato Drinks for Japan’s Autumn Season Delight
Two of Japan’s top coffeehouse chains face off in a seasonal showdown of autumn flavors, per SoraNews24.
With the arrival of autumn, Japan welcomes sweet potato season, and this year, two American-born coffeehouse giants—Starbucks and Tully’s Coffee—are offering their take on the beloved root vegetable in drink form. Starbucks presents the “Yaki-imo Kobashi Caramel Frappuccino” (Aromatic Baked Sweet Potato Frappuccino), while Tully’s introduces the “Oimo Tea Shake,” each competing for the attention of sweet potato enthusiasts.
Starbucks’ seasonal offering officially launches on September 4, but Starbucks Rewards members like K. Masami got an early taste. Priced at 700 yen (US$4.81), this Frappuccino features sweet potato chunks, imo kenpi (sugar-coated sweet potato chips), caramel sauce, and vanilla, creating a rich blend designed to evoke the taste of a canelé. Masami opted for an extra 55-yen oat milk and found the thick, satisfying texture paired beautifully with the sweet and bitter flavors, describing it as “the flavor of happiness.”
Tully’s Oimo Tea Shake Combines Sweet Potato and Earl Grey for a Perfect Autumn Blend
On the other hand, Tully’s “Oimo Tea Shake,” available since August 28, combines sweet potato sauce and Earl Grey milk tea. Slightly pricier than Starbucks at 690 yen (Short) and 750 yen (tall), this shake’s whipped cream topping is laced with sweet potato sauce and black sesame seeds. Masami was impressed by the fragrant aroma of Earl Grey tea, which harmonizes with the sweet potato for a delicious blend.
Despite her initial expectations, Masami found both drinks equally delightful—Starbucks offered a more indulgent sweet potato experience, while Tully’s balanced tea and sweet potato flavors to perfection. She recommends trying both, starting with the lighter Tully’s option. However, both drinks are limited editions, with the Starbucks Frappuccino available until 10 October and Tully’s Tea Shake while supplies last.


Yes, government influences wages – but not just in the way you might think
Novo Nordisk Raises 2025 Outlook Despite Wegovy Pill Miss and CagriSema Setback
DBS Raises 2025 Outlook After Record Q2 Profit Driven by Wealth Management
The Beauty Beneath the Expressway: A Journey from Self to Service
The American mass exodus to Canada amid Trump 2.0 has yet to materialize
Why have so few atrocities ever been recognised as genocide?
Western Digital Q4 Earnings Beat Estimates as FY2027 Outlook Tops Expectations
Time to buy local: war fuel price shocks reveal the folly of a long food supply chain
Can your cat recognise you by scent? New study shows it’s likely
Siemens Energy Q3 Profit Beats Forecast as AI-Driven Power Demand Fuels Growth
Sinopec Boosts Russian ESPO Oil Purchases as Middle East Supply Tightens
Heritage, desire and diplomacy: why China still values scotch whisky
Alibaba Plans Revenue-Sharing Model for Qwen3.8-Max AI Commercial Users
SpaceX Targets Starship Flight 14 With First V3 Starlink Satellite Launch
Alphabet Stock Slides as Google AI Pioneer Jeff Dean Exits to Launch Discovery Loop
Meta AI Model Exploits Security Flaw During Cybersecurity Test, Raising AI Safety Concerns
UK AI Security Tests Reveal Anthropic and OpenAI Agents Attempted Unauthorized Actions 



