How to use a kyusu correctly involves preheating the pot, using the right leaf-to-water ratio, controlling water temperature, steeping for the correct time, and pouring out every last drop to prevent over-extraction.
This article covers every step in the process, from preheating the pot to pouring the last drop without over-extracting.
You will also find tea-specific settings for sencha, gyokuro, and genmaicha, so you can adjust your approach depending on what you brew.
Let's get started!
How to Use a Kyusu: Preheat, Measure, Steep, and Pour Correctly
Knowing how to use a kyusu correctly starts with preheating the pot and cups, adding the right amount of tea, controlling water temperature, and pouring completely after steeping to maintain proper extraction across multiple infusions.
Warming the Kyusu and Cups
Fill the kyusu with hot water and let it sit for about 30 seconds, then pour that water into your cups to warm them too. This keeps the brewing temperature stable from the first second the tea hits the water.
Cold clay and cold cups pull heat away from the water instantly; this is especially noticeable with a red Japanese clay teapot, which retains and distributes heat in a way that makes preheating particularly worthwhile. This drops the temperature below the ideal range and results in weak extraction. Preheating is not optional it is part of why Kyusu brewing produces better results than simply steeping in any vessel.
Adding Tea Leaves and Water
Add your leaves to the empty, prewarmed kyusu first. Then pour the water over the leaves rather than the other way around. Pouring water into an already-filled pot disturbs the leaves and can cause uneven extraction.
The exact water temperature depends on the type of tea you are brewing, which is covered in detail in the next section. Never use boiling water directly on green tea leaves, as it can quickly lead to a harsh, overly bitter cup.
Before diving into technique, you may also want to read the full breakdown of this brewing vessel. 👉 Kyusu Teapot Complete Guide by Japanese Tea Experts
Pouring Evenly Without Over-Steeping
Once steeping is complete, pour every last drop out of the kyusu. Tea left sitting in the pot continues to brew against the leaves, which ruins the second infusion and makes the first one too strong by the time you finish the cup.
When serving into multiple cups, alternate between them in short rotations rather than filling one completely before moving to the next. This ensures each cup receives the same concentration from start to finish.
This is the foundation of the kyusu teapot: how to use it correctly, as each step directly affects extraction, balance, and overall flavour.
Water Temperature and Steeping Time for Kyusu
Water temperature is the single variable that most affects whether green tea tastes sweet and smooth or bitter and flat. The kyusu teapot is built to hold heat consistently, so if you start at the wrong temperature, the entire brew is off.
Water temperature depends on the tea: around 60°C for gyokuro, about 70°C for sencha, and 80 to 90°C for genmaicha or hojicha. For timing, sencha is best brewed for around 60 seconds, while gyokuro can steep for up to 2 minutes without becoming bitter.
Genmaicha and hojicha can sit for about 60 seconds at higher temperatures, though some producers also recommend a quick "flash brew" for genmaicha at around 95°C for just 5 seconds to highlight its roasted character. Never use boiling water directly on green tea leaves, as it can quickly lead to a harsh, overly bitter cup.
How Much Tea to Use in a Kyusu
The standard ratio when learning how to use a kyusu teapot is roughly 3 to 4 grams of loose leaf tea per 100 millilitres of water. A 200-millilitre kyusu, which is the most common size, works well with 6 to 8 grams.
This is a higher ratio than most people are used to from Western-style brewing, but it makes sense in context. Japanese green tea is meant to be brewed in small batches and re-steeped multiple times, so the concentration per cup is intentionally higher at the start.
If your tea tastes thin or lacks depth, increase the leaf quantity before adjusting time or temperature. Under-leafing is one of the most common errors in kyusu brewing and produces flat, watery results no matter how careful you are with everything else.
How to Pour Properly from a Kyusu Teapot
The side-handle design of the yokode kyusu allows a smooth, single-handed pour controlled entirely by a wrist rotation. Grip the handle with four fingers and use your thumb to hold the lid steady at the top. From there, you tilt the pot in one fluid motion rather than lifting and tilting with your whole arm.
Keep the pour continuous and do not pause halfway through. Stopping mid-pour causes uneven extraction in the leaves still inside, which affects the flavour of the next steep.
Empty the kyusu completely at the end of every infusion. This is essential. Even a tablespoon of liquid left behind means the leaves sit in contact with water between steeps, which over-extracts them and ruins the third or fourth infusion.
Common Mistakes When Using a Kyusu
The most frequent mistake when learning how to use a kyusu teapot is using water that is too hot. Boiling water activates the catechins in green tea rapidly, producing bitterness that cannot be corrected once it is brewed. Always let boiled water cool before pouring.
The second most common error is not emptying the pot after each infusion. Leaving liquid in the kyusu between steeps is the fastest way to produce a bad third cup, even if the first two were excellent.
Using too few leaves is the third. Many people try to replicate a Western steeping approach with green tea and use around one teaspoon per cup. That ratio produces a brew that is too weak to show what the tea can actually do. If you're also exploring other ways to prepare your tea, there are more options than most people realise. 👉 How to Make Loose Leaf Tea Without an Infuser
Finally, skipping the preheating step leads to temperature instability. Even a few degrees off can mean the difference between a smooth, sweet cup and a flat one with none of the umami the tea should deliver.
Getting Consistent Results with Your Kyusu
Consistency comes from measuring, not estimating. Use a kitchen scale to weigh your leaves and a thermometer or a temperature-controlled kettle to hit the right water temperature; both are available as part of a wider range of Japanese tea accessories designed around this style of brewing. Eyeballing both leads to unpredictable results, especially across different teas.
Record the variables that worked for each tea you brew: the leaf weight, water temperature, steeping time, and number of infusions before the flavour dropped off. Kyusu brewing rewards attention to detail. Once you find the right settings for a specific tea, replicating that brew is straightforward every time.
Rinse the kyusu with hot water after every use and leave the lid off until it is completely dry. If you are using an unglazed clay kyusu, avoid soap entirely; the clay is porous and absorbs flavour over time, which is one of the reasons this style has been prized by Japanese tea drinkers for centuries. The clay is porous and absorbs flavour over time, which actually improves brewing, but soap residue does the same thing and ruins it.
Using a Kyusu for Different Types of Japanese Tea
The kyusu teapot is designed around Japanese green teas, but how to use a kyusu changes depending on which tea is in the pot, and understanding the full range of Japanese teapot types can help you appreciate why this shape became the standard.
Sencha is the most common match for kyusu brewing. It brews at 70 to 75 degrees Celsius, steeps for 60 to 90 seconds, and holds up for three to four infusions. The second steep is often the best, as the leaves are fully open and the amino acids have had time to develop.
Gyokuro requires the lowest temperature of any common Japanese tea, 55 to 65 degrees, and rewards patience. At that temperature range, the tea produces an intensely savoury, sweet cup with very little bitterness. It is one of the most compelling ways to experience what a well-used kyusu can extract from a premium tea.
Genmaicha and hojicha are more forgiving. Both tolerate higher water temperatures and shorter steeping times, which makes them a practical starting point if you are new to using a kyusu teapot. Fukamushi sencha, a deep-steamed variety, releases flavour quickly and benefits from a metal mesh filter inside the kyusu to prevent the finer leaf particles from clogging the spout. The Tokoname Kyusu Fukamushi Teapot is built specifically with this in mind.
If you are new to Japanese loose leaf and want to try a well-sourced selection suited to kyusu brewing, Nio Teas carries sencha, gyokuro, genmaicha, and several other varieties worth exploring, and if you're also looking to set up your brewing space properly, their kyusu tea sets offer a convenient starting point.
What Makes Kyusu Brewing Worth Learning
The kyusu teapot is a precise instrument, and how to use a kyusu correctly is what separates a flat, lifeless cup from one that genuinely expresses the character of the tea.
The key principles are simple: preheat the pot, measure your leaves, control the water temperature, steep for the right amount of time, and empty the pot completely after every pour. Each step has a direct effect on the cup, and once you have the process down for one tea, adapting it to others is straightforward.
Green tea at the right temperature and ratio tastes completely different from tea brewed carelessly. If you have been disappointed by Japanese green tea in the past, the method was likely the problem rather than the tea itself. A kyusu used well changes that entirely.
For a deeper look at the different types of Japanese loose-leaf teas that brew well in a kyusu, the Nio Teas blog covers sencha, gyokuro, and genmaicha in detail, a good reference to read alongside your first few brews.
