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Refreshing Summer Sips: How to Brew Perfect Japanese Iced Coffee

Get ready to wow your friends this summer with the secrets to brewing the ultimate Japanese iced coffee. Stay cool and caffeinated with our foolproof recipe.

9 min read
japan drip coffee
Photo-Illustration: Catchy Shopper

In This Article

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Welcome back, coffee enthusiasts! As we continue our exploration of the vast world of coffee, today, we're heading to the land of the rising sun, Japan, to take a deep dive into the refreshing realm of Japanese Iced Coffee. This unique brewing technique has garnered a devoted following among coffee lovers worldwide, thanks to its distinctive approach that gives a flavorful twist to your typical iced coffee.

In our previous coffee series, we ventured into the multifaceted universe of coffee machines, examining every contraption you could imagine - from Coffee Makers with Grinders to Small Coffee Makers, Coffee & Espresso Maker Combos, and Manual Coffee Makers.

Dive Into The World of Coffee Machines
Discover more coffee bliss with our enticing Coffee Series: Coffee Maker with Grinder, Iced Coffee Makers, Small Coffee Makers, Coffee & Espresso Maker Combos & Manual Coffee Makers

We also embarked on a journey into the world of iced coffee, where we discussed everything from the basics of What is Iced Coffee and How to Make Iced Coffee to intricate recipes like Protein Iced Coffee and global favorites like Thai Iced Coffee.

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Discover iced coffee bliss with our enticing Iced Coffee Series: What is Iced Coffee, How to Make Iced Coffee, Iced Coffee Makers, Protein Iced Coffee Recipes, Coffee Ice Cream, Thai Iced Coffee, Iced Coffee Tumblers

Moreover, our exploration of coffee beans unveiled a world of diverse brews, inviting you to sample the wonders of Mushroom Coffee, experience the mildness of Low Acid Coffee, indulge in the raw power of Green Coffee, and the bold intensity of Espresso Coffee.

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Venture into the realm of alternative brews with our curated selections of Mushroom Coffee, Low Acid Coffee, Green Coffee & Espresso Coffee

As we venture into today's blog post, we will be exploring Japanese Iced Coffee in depth. We'll learn what sets it apart, understand the optimal coffee-to-water ratio, discover how to make it using various equipment like Chemex and V60, and even touch upon James Hoffmann's approach to this brewing method. We will also be sharing a tried-and-tested recipe, ensuring you have everything you need to prepare this delightful coffee variant at home. So, prepare to embark on another exciting coffee journey, and let's dive right into the invigorating world of Japanese Iced Coffee!

What Is Japanese Iced Coffee?

Japanese iced coffee, also known as flash-brewed coffee or iced pour-over, is a brewing method where hot coffee is immediately cooled down by dripping it directly onto ice. This technique results in a beverage that beautifully preserves the delicate aromatics and intricate flavors of the coffee, creating a refreshingly bright and clear drink that contrasts with the heavier, muted tones of traditional cold brews.

japanese brew
Japanese Ice Coffee

Japanese iced coffee emerged from Japan's deep respect and love for tea, transferring the philosophy and techniques of brewing delicate teas into the world of coffee. The result is a coffee that mirrors the nuances, clarity, and complexity found in fine teas. This brewing method gained popularity in the 1960s and has since become a staple in Japanese coffee culture, with its appeal spreading across the globe.

The BEST Cold Coffee? Japanese Iced Coffee!

When compared to cold brew coffee, Japanese iced coffee stands out for its immediacy and vibrant flavor profile. While cold brew involves steeping ground coffee in cold water for many hours to extract flavors, Japanese iced coffee is brewed hot and then flash chilled, allowing it to retain the coffee's acidity and aromatic compounds better. This method provides instant gratification that cold brew can't deliver, with a bright, nuanced cup of coffee ready in just a few minutes.

japanese drip coffee
Cold Brew vs Japanese Coffee

Freshly roasted coffee beans are a non-negotiable component of Japanese iced coffee. The freshness of the beans is crucial in capturing the full spectrum of flavors and aromatics. By using freshly roasted beans, you're not just brewing coffee - you're preserving the essence of the bean itself, the terroir of its origin, and the artistry involved in its transformation from a simple seed into a symphony of flavors in your cup.

japanese coffee dripper
Freshly Roasted Coffee Beans 

Japanese Iced Coffee Ratio

The golden ratio for brewing Japanese iced coffee is typically a 1:15 coffee-to-water ratio, meaning you'll need 1 gram of coffee for every 15 grams of water. However, this ratio varies slightly when you consider the ice as part of the total water content. A commonly used formula is the 40-60 rule. This means 40% of the water used is ice placed in the carafe, and the remaining 60% is hot water used for brewing.

best japanese coffee
Japanese Iced Coffee Ratio

Understanding and adhering to this ratio is crucial as it ensures a well-extracted and balanced flavor in your coffee. A higher coffee-to-water ratio could result in a brew that's too strong and potentially bitter, while a lower ratio might yield weak, underwhelming coffee. The right balance will give you a rich, robust flavor that's neither too overpowering nor too subtle.

How to Make Japanese Iced Coffee

Crafting Japanese iced coffee is a methodical process that, once mastered, becomes a delightful part of any coffee lover's routine.

pour over coffee japan
How to Make Japanese Iced Coffee

Here's your step-by-step guide:

  1. Measure Your Ingredients: Adhering to the 40-60 rule, if you want to make a 500ml brew, you would use 200g of ice and 300g of hot water. Alongside this, you'll need around 30g of coffee. Remember, precision is key to a well-balanced brew, so using a kitchen scale is recommended.
  2. Prepare Your Coffee: Grind your freshly roasted coffee beans to a medium-fine consistency, similar to table salt.
  3. Set the Stage: Place your ice into the carafe. If you're using a pour-over cone like a V60 or a Chemex, position it on top of the carafe.
  4. Brew Your Coffee: Place the ground coffee into the coffee filter inside your pour-over cone. Slowly pour over the hot water (just off the boil), starting with a small amount to let the coffee "bloom" for about 30 seconds. Then continue to pour the remaining hot water, ensuring all the coffee grounds are evenly saturated.
  5. Enjoy! Once the hot coffee has dripped onto the ice, giving it an immediate chill, your Japanese iced coffee is ready. Serve it in a glass with a few more ice cubes if desired, and enjoy your refreshingly cool and delicious brew.

💡Pro Tip: For the best results, use coffee that's been freshly ground just before brewing. The freshness of the ground coffee will make a significant difference in the overall taste and aroma of your Japanese iced coffee.

Japanese Iced Coffee Chemex

Creating Japanese iced coffee with a Chemex is a coffee enthusiast's delight. The Chemex, with its unique design and thicker filters, creates a clean, bright brew that suits the Japanese iced coffee style remarkably well.

  1. Prepare Your Ingredients: As per the 40-60 rule, if you're making a 500ml brew, you'll need 200g of ice and 300g of hot water, and about 30g of freshly ground coffee.
  2. Set Up Your Chemex: Firstly, ensure you properly rinse your Chemex filter under hot water to remove any residual paper taste. Place it in the Chemex with three layers covering the pouring spout. Add ground coffee to the filter.
  3. Brew Your Coffee: Start by pouring just enough hot water over the coffee grounds to let them bloom for about 30 seconds. Then continue pouring the remaining water in a slow and steady circular motion.
  4. Enjoy Your Brew: Once all the water has passed through the coffee and onto the ice, your Chemex-brewed Japanese iced coffee is ready. Pour it into a glass, add a few more ice cubes if you like, and savor the refreshingly crisp and clear flavors.

The Chemex, due to its design and proprietary filters, tends to produce coffee with a cleaner taste profile compared to other methods like the French press or a standard drip machine. This clarity allows the vibrant, nuanced flavors of your coffee beans to shine through.

💡Pro Tip: When preparing your Chemex, make sure to thoroughly rinse your filter with hot water. This helps to remove any papery taste that might interfere with the flavors of your coffee.

How to Brew Iced Coffee with a Chemex

Japanese Iced Coffee Maker

Making Japanese iced coffee is all about technique, but having the right equipment surely helps streamline the process. Various coffee makers are suitable for this refreshing drink, each lending a unique flavor profile and body to your brew.

japanese coffee machine
Japanese Iced Coffee Maker

Let's explore some popular options:

  1. Pour-Over Cones (Hario V60, Chemex): These devices allow for precise control over the brewing process. The V60, with its conical design and single large hole, enables a quick brew time, producing a clean cup. The Chemex, with its proprietary thick paper filters, yields a super clean and crisp cup, ideal for highlighting the bright flavors in your iced coffee.
  2. French Press: Contrary to pour-over methods, the French Press imparts a full-bodied, rich flavor to your coffee, courtesy of its metal filter. Though not traditionally used for Japanese iced coffee, it can certainly produce a delicious, robust brew. Add your coffee grounds and hot water, let it steep, then press the plunger and pour the brewed coffee directly over ice.
  3. Automatic Drip Machines: Some machines are specifically designed for iced coffee, with dedicated settings for brewing hot coffee directly over ice. They can be a convenient option if you're looking to save time without compromising on flavor.

💡Pro Tip: While not traditional, the French Press is a versatile option for Japanese iced coffee, particularly if you enjoy a fuller-bodied brew. Just be sure to use coarse grounds and a short brew time to prevent over-extraction.

For more detailed insights on various coffee makers and brewing methods, do check out our coffee machine series: Discover more coffee bliss with our enticing Coffee Series: Coffee Maker with Grinder, Iced Coffee Makers, Small Coffee Makers, Coffee & Espresso Maker Combos & Manual Coffee Makers.

Dive Into The World of Coffee Machines
Discover more coffee bliss with our enticing Coffee Series: Coffee Maker with Grinder, Iced Coffee Makers, Small Coffee Makers, Coffee & Espresso Maker Combos & Manual Coffee Makers

Japanese Iced Coffee Recipe

This recipe, designed to deliver the authentic Japanese iced coffee method experience, serves 2 and results in about 500 ml of revitalizing Japanese-style iced coffee.


  • 30 grams of freshly roasted coffee beans
  • 200 grams of ice
  • 300 grams of boiling water
japanese iced coffee v60
Japanese Iced Coffee Recipe


  1. Grind Your Coffee: Begin your journey towards making iced coffee by grinding your coffee beans to a medium-fine consistency, similar to the texture of table salt.
  2. Prepare Your Brewing Equipment: If you're using a pour-over device such as a Hario V60, place it over a large jug or a carafe containing 200 grams of ice. Insert a filter, rinsed to remove any papery taste, and then add your ground coffee.
  3. Brewing the Iced Coffee: Initiate the brewing process by pouring just enough boiling water onto the coffee grounds to saturate them, and let them "bloom" for 30 seconds. Continue by gradually pouring the rest of the hot water in a steady, circular motion, making sure that all the coffee grounds are evenly saturated. This should take around 2-3 minutes.
  4. Drink and Revel in Your Iced Coffee: After all the water has filtered through the coffee grounds and melted the ice, your freshly brewed Japanese ice coffee is ready to be enjoyed. Pour it into a glass, and if you prefer your drink extra cold, add a few more ice cubes. Now is the time to relax and appreciate the vibrant and nuanced flavors of your homemade cold coffee.

💡Pro Tip: For a more complex and bright cup of Japanese-style iced coffee, we recommend using a light roast coffee. The technique of flash chilling, or pouring hot coffee directly onto ice, is a critical part of the Japanese iced coffee method. This quickly cools down the coffee, locking in its original flavors and giving you a rich, aromatic, and delightfully cool coffee drink.

Final Thoughts

In wrapping up, we encourage all coffee lovers to try their hand at brewing Japanese iced coffee. It's a unique, delightful experience that's sure to captivate your senses. Dive into the process and see how the transformation unfolds - from freshly roasted coffee beans to a beautifully balanced, freshly brewed coffee drink.

With the art of brewing iced coffee now demystified, the process of creating your own Japanese iced coffee at home becomes a delightful endeavor. So why wait? Brew, pour, and enjoy the vibrant taste and aroma of your own Japanese iced coffee. Don't forget to share your brewing journey with us - we'd love to hear all about it!

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