
- HOME >
- How to enjoy tea
Cooling speed of water differs depending on the volume of teapot
- [2018.01.23] Posted By Akira Hojo
The smaller the size of teapot the faster the temperature it cools down
Some people tends to use a small teapot to brew tea, and assumed that smaller teapot can hold the temperature. The fact is the smaller the teapot, the the faster the temperature drops. It is because of the ratio between the inner surface area and the volume of water. The specific surface area becomes smaller when the volume of teapot is bigger. On the contrary, the smaller the teapot, the more specific surface area. As a result, more water exchanges its heat energy with the surface of clay and it cools down water faster. After all, the smaller the teapot, the faster it cools down. Relatively, the big teapot can hold the temperature for a longer time.
Brewing Japanese green tea
In general, the brewing temperature of Japanese green tea is recommended at below 80 degree C. It is because most of Japanese green teas are grown with fertilizer which makes the taste of tea very bitter. The bitterness comes from caffeine. The caffeine will be effectively extracted with hot water above 80 degree C. So, if we brew tea at below 80 degree C, you can avoid or minimize the bitterness.
On the other hand, some Japanese green teas grown without fertilizer originally give the least bitter taste. So, it is not necessary to brew it at lower temperature. On the contrary, it is very important to brew these teas at higher temperature in order to effectively extract the flavor substance, reduce the astringency and enjoy a clean and clear drinking sensation.
A big teapot is suitable for a beginner.
Brewing tea at high temperature is not that easy as how it sounds. It requires various brewing skills, such as pre-heating of teapot and rinsing tea with boiling water. In most of the cases, a beginner might face greater challenges to brew tea at high temperature. Considering this fact, we recommend the beginner to use a bigger teapot. As I mentioned earlier, a big teapot retains the heat for a longer time. Even if one does not have a good skill of brewing, it is less difficult to maintain it at very high temperature throughout the brewing. Of course, a small teapot is also a useful equipment as long as it is handled with skills.
https://hojotea.com/jp/posts-1029/
Measurement of water temperature in different size of teapot
The above video was made based on three different sizes of teapot. These teapots are made from exactly the same clay (i.e., the Akitsu Mumyoi Oxidation Fired Teapot). I poured boiling water into three teapots and left for a minute. The volume is 100ml (right), 140ml (middle) and 300ml (left). We noticed that there was 6 degree C of difference. These teapots are not pre-heated.
100ml 79℃
140ml 83℃
300ml 85℃
The room temperature was at around 25 degree C. If we conduct the same experiment in a colder room, the difference will be more. If the teapot with the volume of 100ml is not pre-heated, the temperature reduced around 20 degree C. The temperature inside the teapot is much lower than what we imagine.
Related Articles
How to get the latest update on HOJO Tea?
1. Follow Twitter, 2. Click "Like" on Facebook, and 3. Subscribe in newsletter. You can have the latest tea news from HOJO Tea.
Subscribe the Newsletter to enjoy the privileges
- You may receive a free sample upon purchase, or you may have the priority to purchase special products. So please remember to subscribe our newsletter as well as the social network.
- Introducing 3 High Grown Darjeeling First Flush Teas Produced Using Sustainable Methods
- We have released three types of Darjeeling First Flush, all of which are grown sustainably. The tea gardens are maintained using natural farming methods, and the use of fertilizers is limited when growing the tea trees. As a result, the tea gardens closely resemble their natural state. Unlike common Darjeeling tea, these teas grow slowly, …
- New Release of Tsuge Zairai Sencha from Sustainable Tea Garden
- Tsuge Zairai Sencha 都祁在来煎茶 is made from “zairai” tea plucked in spring, from the naturally farmed tea garden located in Tsuge, Nara City, Nara Prefecture. The tea garden of Tsuge Zairai Sencha is maintained in sustainable manner applying neither pesticide nor fertilizer. Tsuge Zairai Sencha has a subtle and refreshing floral scent with a hint …
NEW ARTICLES
Introducing 3 High Grown Darjeeling First Flush Teas Produced Using Sustainable Methods
- We have released three types of Darjeeling First Flush, all of which are grown sustainably. The tea gardens are maintained using natural farming methods, and the use of fertilizers is limited when growing the tea trees. As a result, the tea gardens closely resemble their natural state. Unlike common Darjeeling tea, these teas grow slowly, …
New Release of Tsuge Zairai Sencha from Sustainable Tea Garden
- Tsuge Zairai Sencha 都祁在来煎茶 is made from “zairai” tea plucked in spring, from the naturally farmed tea garden located in Tsuge, Nara City, Nara Prefecture. The tea garden of Tsuge Zairai Sencha is maintained in sustainable manner applying neither pesticide nor fertilizer. Tsuge Zairai Sencha has a subtle and refreshing floral scent with a hint …
New Release of Da Xue Shan Wild White Tea Cake 2021
- Da Xue Shan Wild White Tea 2021 is available now. This tea is always very popular in our shop. In Japan, we brought in loose tea this year, and for Malaysia we produced 200g cake. Mao cha before compressing into cake Very limited resources This tea is made from the wild tea, called Camelia taliensis. …
New Release of 2 Types of Darjeeling 1st Flush
- We have released two types of Darjeeling 1st Flush Tea. The reason why the Darjeeling 1st Flush is greenish In Darjeeling tea, the 1st flush refers to the first-plucked spring tea. Usually, the Darjeeling 1st Flush tea is greenish. From the outlook, it looks like a green tea. Many people misunderstand that it is green …
Gushu Dian Hong, The Rare Yunnan Black Tea made from Ancient Tea Tree
- The characteristic of Gushu Dian Hong is its intense aftertaste, and this is far better than ordinary black tea. Dian Hong means Yunnan Black Tea Yunnan black tea is called “Dian Hong” in Chinese. “Dian” means Yunnan, and “Hong” means black tea. Gushu means Ancient Tree in Chinese. After all, Gu Shu Dian Hong means …
Limited Release of Single Tree Raw Pu-erh Tea from Pine Forest Ancient Tea Garden
- We have released Pine Forest Single Tree Raw Pu-erh 2019. This tea was made from the fresh tea leaves collected from very old tea trees grown under the shade of the pine forest. The tea trees are more than 300 years old. It is a good chance for you to experience the distinctive characteristic of …
New Release of Wu Jia Zhai Raw Pu-erh Tea 2018 Loose
- We have released Wu Jia Zhai Raw Pu-erh Tea. It is a Loose Tea (Mao-cha). This tea was made in 2018 and has been aged for nearly three years. Thanks to the aging, it has developed more distinctive flavour with sweet scent of sugar cane and dried fruits. Sustainable Tea Garden at high altitude of …
New Release of Tong Mu Shui Xian Black Tea
- We have released very rare black tea, Tong Mu Shui Xian Black Tea. This tea is from Tong Mu Guan in Wuyishan, Fujian Province, China. The tea garden is located at 1000m above sea level, and the tea garden is totally sustainable, the tea trees are grown without pesticide and fertilizer. Tong Mu Shui Xian …
New Release of Da Xue Shan Wild White Tea 2020
- We have launched Da Xue Shan Wild White Tea 2020, in loose tea. For Malaysia, we release the 200g cake version. This year, we have made major improvements in the raw material, producer, and production method, resulting in a very satisfying quality. However, the production volume is extremely small; it will likely to be sold …
Limited Release of Yunnan 10 Years Vintage Black Tea 2010
- We release 10-year vintage Yunnan black tea. This tea was produced in 2010 and aged in Yunnan for 8 years in aerobic storage. We bought this year in 2018, and it has been aged in Japan and Malaysia for two years in anoxic storage condition. The production area is very near to the Myanmar border …
Shop Info

Address:Lot No. T-215, 3rd Floor, The Gardens Mall, Mid Valley City, Lingkaran Syed Putra, 59200 Kuala Lumpur
Tel: +603-2287-4537
Business Hour: 10am to 10pm
Category
- New Arrival at HOJO Online Shop
- Featured Articles
- Newsletter
- Types of Tea
- Origin of Tea
- Teapot and Tea Equipment
- Tea Column
- How to enjoy tea
- Tea Processing
- How to choose quality tea
- Tea constituents and functional effect
- Safety of Tea
- Foods
- Tea Business Operation
- Hobby and Outdoor Activity
- Ranking of Tea
- Video
- FAQ
- Media Release
Profile

- AKIRA HOJO
- I invite you to experience my tea selections.I was born in Nagano, Japan. In university, I studied agricultural chemistry, and I have the master degree in food science. I worked in Japanese food industry for 10 years. I involved in R&D, QC and QA. As a factory manager, I implemented ISO9000 series and managed the factory.
- The Art of Tea Magazine
- We posted the article on “The Art of Tea Magazine No.9, the magazine is published in Taiwan. We featured some scientific view about the tetsubin
- New Straits Times
- The Malaysian National Newspaper, New Straits Times featured HOJO Tea on 17-Oct-2007.