Hello! This is Goencha. It's been extremely hot every day... Summer is finally here! On a hot day, a glass of cold green tea tastes amazing! But did you know that a cup of green tea actually has many beneficial effects on the body?
This article shares practical tips for enjoying cold-brewed green tea in summer, including flavor, preparation, and caffeine considerations. Cold green tea can be refreshing, but water should remain the main choice for hydration in hot weather.
For seasonal greetings, we recommend chayori, a Japanese summer drink!
You can easily make delicious cold-brewed green tea!
Table of Contents
Cold green tea in summer: flavor, hydration, and caffeine
Cold green tea can be a refreshing drink on hot days. It is useful to understand its flavor, brewing method, and caffeine content, while keeping regular water intake as the foundation of hydration in hot weather.
Enjoy a refreshing drink while keeping water as your hydration base
Hot weather increases the need to drink fluids regularly. Water is generally the best basic choice for hydration; cold green tea can be enjoyed alongside it for its flavor and refreshment.
Green tea contains caffeine, and the amount can vary with the tea leaves and how it is brewed. People who are sensitive to caffeine may wish to choose the amount and timing that suit them.
What brewing changes
Green tea naturally contains components such as catechins, caffeine, and theanine. Their amounts and the taste of the tea can vary by leaf, water temperature, steeping time, and serving size; these differences should not be treated as medical effects.
| Component | What to know |
|---|---|
| Catechins | Naturally occurring tea compounds; research on specific health outcomes does not establish that a cup of cold green tea prevents illness. |
| Caffeine | May affect alertness and sleep differently from person to person; the amount varies by tea and brewing conditions. |
| Theanine | A naturally occurring amino acid in tea; it does not make green tea a treatment for stress or other health conditions. |
| Vitamin C | Amounts vary, and green tea should not be relied on as a source of vitamin C for health purposes. |
Choose the tea, amount, and timing that fit your taste and routine, and seek individual medical advice when needed.
Summer Cold Brew Festival is now underway! The tea novelty is “Kyoto Gyokuro’s Goen Tea”
What is Kyoto Gyokuro’s Goen Tea?
" Kyoto Gyokuro's Goen Tea " is a tea shop that delivers fun tea from Kyoto with the concept of "making tea more fun"! We create plans tailored to your needs, making high-quality tea more accessible and exciting to enjoy.
We value the idea that "tea connects people," and we have a wide selection of products that are perfect for everyday tea time, as well as gifts for special people and corporate novelties. Particularly popular as corporate novelties are products that can be personalized with original designs or names !
"Thank you," "Congratulations," "I look forward to working with you in the future!"
Why not convey these feelings through tea?
Here are some recommended novelties that can convey a message!
A special tea packed with feelings. Create a one-of-a-kind tea with an original greeting tea design. Custom order
Speaking of summer, cold brew is the best! So, we will be holding the "#ColdBrewGoenTeaCampaign" from Sunday, July 20th to Tuesday, August 19th, 2025!!! This time, the campaign will be held simultaneously on Instagram and X! Click here
for campaign details ! We look forward to receiving many applications!
Five practical points about cold green tea
Cold green tea can be a pleasant part of a summer routine. These practical points focus on hydration, flavor, and caffeine awareness rather than unproven health claims.
Keep water as the main drink for hydration
Drink water regularly in hot weather. Cold green tea can be an enjoyable alternative at times, but it should not be presented as preventing heatstroke or replacing water-based hydration.
Cold brewing can create a milder flavor
Brewing tea slowly in cold water often produces a gentler flavor with less bitterness and astringency. The result varies with the tea leaves, water temperature, and brewing time.
Caffeine affects people differently
Cold green tea still contains caffeine. Some people may find a cup refreshing, while others may prefer to limit it later in the day or choose a smaller serving.
Enjoy tea for its taste, not as illness prevention
Current evidence does not establish that drinking cold green tea prevents colds, influenza, bad breath, or other health conditions. It can still be enjoyed as a flavorful drink after a meal or during a break.
Choose unsweetened tea when that suits your routine
Plain green tea has very few calories. Choosing it instead of a sugary drink may fit some people's preferences, but it should not be described as a fat-burning, blood-sugar-control, digestive, or weight-loss treatment.
If tea causes discomfort, affects sleep, or does not suit your health needs, adjust the amount or choose another drink.
Tips for enjoying cold green tea effectively
Hot and cold green tea: differences in brewing and flavor
Hot and cold brewing can produce noticeably different flavors. The amount of tea compounds in a cup also varies with the leaves, water temperature, steeping time, and serving size.
Hot water often brings out stronger bitterness, astringency, and aroma. Cold brewing often creates a milder, sweeter-tasting cup, although the result depends on the tea and preparation.
These differences are useful for choosing the taste you enjoy. They should not be treated as proof of medical, digestive, or sleep-related effects.
| Aspect | Hot green tea | Cold green tea (cold brew) |
|---|---|---|
| Flavor | Often more pronounced bitterness, astringency, and aroma | Often milder and sweeter-tasting |
| Brewing conditions | Hot water and a shorter steeping time | Cold water and a longer steeping time |
| Caffeine and other components | Amounts vary by leaves and preparation | Amounts vary by leaves and preparation |
| When to enjoy | Choose according to taste and temperature preference | Choose according to taste and temperature preference |
Practical characteristics of cold brew
- Milder flavor
Cold brewing can bring out a smoother taste with less bitterness for many teas. - Flexible preparation
You can adjust the leaves, water, and brewing time to find the flavor you prefer. - Caffeine awareness
Caffeine remains present and can vary, so adjust the amount and timing if you are sensitive to it. - Hydration routine
Enjoy cold tea for its taste alongside regular water intake in hot weather.
Things to keep in mind
- Food safety
Use clean equipment, refrigerate cold-brewed tea, and follow safe storage guidance. - Individual tolerance
If tea causes discomfort or affects sleep, reduce the amount or choose another drink. - No health-treatment claims
Cold green tea is a drink to enjoy, not a substitute for medical care or a treatment for health conditions.
How to brew delicious cold green tea and when to drink it
To enjoy cold green tea even more, it helps to know how to brew it for the flavor you prefer and to choose a time that suits your caffeine sensitivity. Cold brewing can bring out the umami flavor of green tea with a milder taste.
How to brew delicious cold green tea (cold brewed green tea)
Cold-brewed green tea is brewed slowly over time, which can bring out its sweetness and flavor while reducing bitterness and astringency. Caffeine is still present and varies by tea and preparation, so people who are sensitive to it may wish to limit the amount or avoid it close to bedtime.
For preparing tea leaves
for cold brewing, we recommend deep-steamed sencha, kukicha, and gyokuro. These tea leaves are rich in umami and have the distinct feature of bringing out their flavor even in water.
Prepare the water:
Use mineral water (soft water) or tap water that has been boiled and cooled. Hard water with a high mineral content can change the taste of the tea.
How to brew
- Put tea leaves into a clean water cooler or pitcher. (Guideline: 10-15g of tea leaves per 1 liter of water)
- Slowly pour in the water and stir gently to moisten the tea leaves.
- Cover and place in the refrigerator for 2-6 hours before brewing. Leaving it overnight will enhance the flavor even more.
- Once the brewing is complete, strain the tea leaves. If you leave the tea leaves in the brewer for too long, they will become bitter and astringent over time.
point
- Please adjust the brewing time according to the type of tea leaves and your preference.
- Once you have made your cold-brewed green tea, keep it in the refrigerator and drink it within 2-3 days.
Best time to drink cold green tea
Cold green tea is a convenient drink that can be used in a variety of situations. To fully appreciate its benefits, we recommend being mindful of when to drink it, and only a little at a time.
By replenishing the fluids lost during sleep after waking up , your body will wake up smoothly. Cold-brewed green tea is gentle on the stomach and absorbs easily into the body.- It's important to drink plenty of fluids after sweating during and after exercise
. Cold green tea is refreshing and easy to drink, leaving your body feeling refreshed. - Theanine, a component found in green tea, has the ability to calm you down and help you concentrate while you work or study
. It's also perfect for those times when too much caffeine can be a problem.
It helps to clear away oily food and reduce bad odors during and after meals , making it especially refreshing to drink after a greasy meal.
When you have no appetite due to the heat or feel sluggish, cold green tea is a great way to combat summer fatigue . It's smooth and easy to drink. It's packed with not only water but also vitamins and minerals, helping to keep your body healthy.
When to avoid cold green tea
- Green tea brewed before bed
has less caffeine, but it is not completely caffeine-free. If you are sensitive to caffeine, it is best to avoid drinking it before bed. - If you don't want to cool down your body
, drinking lots of cold drinks when you're prone to feeling cold or when you're not feeling well can make your body too cold. In such cases, we recommend letting the drink return to room temperature a little before drinking it, or drinking warm green tea instead.
Summary
Cold green tea can be a refreshing summer drink with a mild flavor when brewed slowly in cold water. Enjoy it alongside regular water intake, keep caffeine sensitivity in mind, and choose it for taste rather than as a health treatment or illness-prevention measure.
