Japan's Secret to Surviving Summer Heat

Picture this: it's 95°F in Tokyo, the cicadas are screaming, and nobody's reaching for a Coke. Instead, they're cracking open a marble-sealed bottle of Ramune, pouring ice-cold mugicha from the family pitcher, or grabbing a Pocari Sweat from the nearest vending machine. Japan has been perfecting summer hydration for well over 100 years, and the country's non-alcoholic beverage market (valued at $40.5 billion in 2025) proves just how seriously it takes its drinks.

We've been stocking and sipping these drinks at Tomato Japanese Grocery for over 20 years, so we decided to rank the best Japanese summer drinks for US shoppers. Our criteria: hydration power, taste, cultural authenticity, kid-friendliness, and how easy they are to find stateside. From roasted barley tea to fizzy marble soda, here's our lineup.

#1 Mugicha (Roasted Barley Tea): The Undisputed Summer Champion

If you ask a Japanese household what lives in their refrigerator all summer, the answer is almost always mugicha. This caffeine-free, zero-sugar roasted barley tea is served ice-cold, and its toasty, slightly nutty flavor is the taste of Japanese summer itself.

Mugicha's roots run deep. The drink traces back to Japan's Jomon period (before 300 BCE), making it potentially older than green tea. June 1st is officially recognized as "Mugicha Day" in Japan, marking the start of barley tea season. The numbers back up the love: a MyVoice survey found that over 40% of Japanese people name mugicha as their top summer drink, far ahead of mineral water at just 9%.

The commercial market is booming, too. Coca-Cola's "Kettle Mugicha" brand alone has sold over 500 million bottles, and ready-to-drink mugicha hit record production volume for the seventh consecutive year in 2024. Major manufacturers like Ito En and Asahi continue to expand their offerings.

Why does mugicha earn the top spot? It checks every box. No caffeine means it won't dehydrate you. No sugar means you can drink it all day without guilt. The flavor is deeply refreshing without being sweet or heavy. It's the pitcher-on-the-counter, pour-it-for-everyone, no-questions-asked summer staple.

Best for: Health-conscious drinkers, kids, caffeine-sensitive adults, and anyone who wants an all-day summer sipper.

#2 Pocari Sweat: The Functional Hydration Powerhouse

Pocari Sweat has one of the best origin stories in the beverage world. Launched in 1980 by Otsuka Pharmaceutical, it was inspired by an employee who watched a doctor drink IV solution to rehydrate after surgery. The result: a light, slightly sweet electrolyte drink designed to replenish what your body loses through sweat.

Its electrolyte composition makes it a smarter hydration choice than most sugary sports drinks. Japan noticed early. By the mid-1990s, Pocari Sweat became the first domestically produced non-alcoholic drink in Japan to ship over $1 billion in product.

If you've seen it in anime, you're not alone. A 2019 anime-style ad was created with the technical director of Your Name, and a 2021 Cells at Work! special episode promoted it as a heat stroke prevention drink. This is the anime-to-real-life pipeline at its finest, helping a new generation of US fans discover the brand.

Pocari Sweat fits perfectly into the current wellness trend of "hydration-first" functional beverages. It's the drink you grab after a run, a beach day, or a summer festival when water alone doesn't cut it.

Best for: Active adults, post-workout recovery, hot outdoor days, and anyone who wants functional hydration with real purpose.

#3 Ramune: The Festival Icon You've Seen in Anime

Ramune is pure summer joy in a bottle. Created in 1884 in Kobe by Scottish pharmacist Alexander Cameron Sim, this carbonated lemonade gets its name directly from the English word "lemonade." But everything else about it is distinctly Japanese.

The star of the show is the iconic Codd-neck bottle, sealed with a glass marble that you pop inward to open. This design was pioneered by Englishman Hiram Codd in the 1870s, and Ramune is one of the very few drinks in the world that still uses it. The satisfying "pop" and clink of the marble is half the fun.

For Japanese consumers, Ramune is pure childhood nostalgia, tied to matsuri (summer festivals), fireworks, and street food stalls. For Western Gen Z audiences, it's a viral discovery through anime, TikTok, and Japanese grocery haul videos. That combination of heritage and trend makes Ramune uniquely special.

The flavor range is wild. Beyond the classic lemon-lime, you'll find melon, peach, strawberry, grape, and yuzu, plus novelty options like curry, wasabi, and takoyaki. Brands like Hatakosen and Sangaria are the most widely recognized. Ramune also makes a fantastic mocktail base. Try mixing it with white peach juice for an easy summer refresher.

Best for: Kids, festival vibes, anime fans, and first-time Japanese drink explorers.

#4 Calpico: The Creamy, Tangy Cult Favorite

Calpico is unlike anything else on this list. It's a lightly sweet, milky-tangy, non-carbonated drink with a flavor that's hard to compare to anything in Western beverage culture. Try it once and you'll either become a lifelong fan or spend the rest of the summer trying to describe it to friends.

Created in 1919, Calpico holds the distinction of being the world's first lactobacilli non-carbonated beverage. Its creator was inspired by airag, a traditional Mongolian fermented milk drink. That's over a century of history in every sip.

A common question from US shoppers: what's the difference between Calpis and Calpico? They're the same drink. The name was changed to "Calpico" for Western markets (the US and Canada) to avoid unfavorable phonetic associations in English. Now produced by Asahi Soft Drink Ltd., Calpico is available at Kroger, Safeway, Asian grocery stores, and on Amazon.

You can find it in two formats stateside: concentrated (which you dilute with water or soda) and ready-to-drink. Flavors include original, strawberry, white peach, mango, and lychee. For a summer mocktail, try mixing Calpico with yuzu honey and sparkling water. It's ridiculously good.

Best for: Those who prefer non-carbonated drinks, kids, and anyone curious about probiotic-adjacent flavors.

#5 Bottled Green Tea & Hojicha: The Sleeper Picks of Summer

Japanese bottled green tea is a cornerstone of convenience store culture in Japan: unsweetened, lightly grassy, and endlessly refreshing on a hot day. Ready-to-drink green tea is also one of the fastest-growing beverage segments globally, expanding at a 10.21% CAGR over 2026 to 2031. Japan exports roughly $62 million in soft drinks to the US annually, with RTD teas leading the way.

The real breakout star here is hojicha. This roasted green tea has low caffeine, a warm and toasty flavor profile (even when served cold), and it's gaining serious momentum worldwide. The RTD hojicha market was valued at approximately $806 million in 2025, growing at a 9.7% CAGR. North America is the fastest-growing region at 12.2% CAGR, which tells you this is more than a passing trend.

Hojicha is almost entirely absent from other summer drink roundups. Most writers haven't caught on yet. But if you've been following the trajectory from matcha to hojicha, you know this is its moment. It's wellness-aligned (low caffeine, no sugar in unsweetened versions), increasingly available in RTD lattes and functional foods, and genuinely delicious over ice.

Best for: Tea lovers, wellness-focused drinkers, and anyone ready to move beyond matcha.

Quick Comparison: Which Japanese Summer Drink Is Right for You?

Here's a side-by-side breakdown to help you decide:

• Mugicha: Caffeine-free, zero sugar, no carbonation, top-tier hydration, excellent for kids, widely available
• Pocari Sweat: Low caffeine, moderate sugar (with electrolytes), no carbonation, best hydration, good for older kids and adults, available at Asian grocery stores and online
• Ramune: Caffeine-free, moderate sugar, carbonated, moderate hydration, great for kids, available at Asian grocery stores and online
• Calpico: Caffeine-free, moderate sugar, non-carbonated (RTD) or mixed, moderate hydration, excellent for kids, available at major US chains and online
• Bottled Green Tea / Hojicha: Low caffeine, low to zero sugar, no carbonation, good hydration, suitable for adults and older kids, available at Asian grocery stores and online

If hydration is your priority, mugicha and Pocari Sweat lead the pack. If you're shopping for kids or a party, Ramune and Calpico bring the fun factor. For a wellness focus, unsweetened green tea and hojicha are your best picks.

Where to Find These Japanese Summer Drinks in the US

Here's the part most articles skip: where do you actually buy these drinks? Calpico is the easiest to find, stocked at Kroger, Safeway, and Amazon. For authentic Japanese brands, specialty flavors, and harder-to-find options like quality mugicha or hojicha, you'll want a dedicated Japanese grocery.

That's where we come in. At Tomato Japanese Grocery, we've spent over 20 years curating a wide selection of Japanese beverages, from everyday staples to seasonal specialties you won't find at a regular supermarket. We serve local customers at our Marietta, Georgia store (with in-store pickup) and ship nationwide to Japanese food lovers across the US.

Ordering fragile items like Ramune bottles online? We use eco-friendly, handle-with-care packaging to make sure everything arrives intact. We also rotate seasonal and limited-edition flavors as they come in from Japan, so there's always something new to discover.

Raise a Glass to Japanese Summer

Japan's summer drink culture is rich, intentional, and genuinely worth exploring. Mugicha for everyday hydration. Pocari Sweat for active days. Ramune for fun and nostalgia. Calpico for creamy refreshment. Hojicha and green tea for mindful sipping. There's something here for everyone.

Try something new this summer. Visit us at Tomato Japanese Grocery in Marietta or shop online to find all of these drinks and more. The Japanese have been mastering summer refreshment for centuries. It's time to take a sip.