The Ultimate Guide to 

Fukamushi-Sencha

[2026]

Many Japanese people enjoy fukamushi-sencha for its rich, deep taste. You may be surprised how different it is from sencha.

Why is it so different?

The longer steaming allows heat to transfer through the entire leaf, weakening it. As the leaves then go through rolling and drying, small particles and powder detach. Those tiny pieces end up in your cup and are consumed directly, and they are a large part of why the taste is so much fuller.⁴

There is also a chemical change. Long steaming increases the water-soluble pectin in the leaf, and pectin is what gives the tea its thicker, rounder mouthfeel while suppressing astringency.³ Pectin is the same substance sold in baking shops for setting jam, and it behaves in a similar way here, giving the liquid body.

While the taste is richer than normal sencha, the steaming also reduces astringency and bitterness, which makes it a smoother drink. It does, however, reduce the fresh aroma that sencha is known for.⁵ That is the trade-off, and it is worth knowing before you buy rather than after.

A tip that saves a lot of guesswork: packaged tea sold in Japan must display a product name field called 名称 (meishō), and 深蒸し煎茶 is one of the officially defined names allowed there.¹ If you are unsure whether something is deep steamed, you can simply read the label rather than judging by the look of the leaf. This will usually be marked on a sticker on the back of the package with the ingredients information.

Fukamushi-sencha carries all the health benefits of Japanese green tea, and a little more besides.

Like sencha, much of the benefit comes from catechins, a type of polyphenol with antioxidant properties. You can read about the details of catechins and other nutrients in Japanese green tea here.

The particular thing about fukamushi-sencha is that you also get nutrients you would not normally get from sencha. These include dietary fibre, chlorophyll, vitamin E, beta-carotene and minerals.⁴ ⁷ These are all present in green tea leaves, but they do not dissolve well in water, so with a normal sencha they stay in the leaves and go in the bin. With fukamushi-sencha, the crumbled leaf floats in your cup as fine particles and is swallowed, so you absorb them as well.⁴

This is also why it is worth drinking the last mouthful. The sediment that settles at the bottom of the cup, called 底だまり (sokodamari), is that insoluble fraction. Leaving it behind means leaving behind the part that makes this tea nutritionally different.

One claim you will see repeated a lot deserves a note of caution. Kakegawa, one of the great deep steamed producing cities, has the lowest cancer mortality rate of any Japanese city with a population above 100,000.⁷ That is true, but it is a statistic about a whole city, and cities differ in many ways at once. It does not by itself show that the tea is the cause. A large study called the 掛川スタディ (Kakegawa Study) did look into it properly, and reported reduced LDL cholesterol and reduced waist circumference among participants.⁷ That is a narrower claim, and a much better supported one.

Nonetheless, I would say drinking fukamushi-sencha regularly is a good health habit.

You may also see 特蒸し (tokumushi), meaning tea steamed even longer than fukamushi, sometimes up to around 180 seconds.

Since the term fukamushi refers to the length of steaming, it can be applied to other Japanese green teas too. Kabuse-cha and tamaryokucha can both be made by deep steaming. So can gyokuro, since gyokuro is defined by how the plant is shaded rather than by how long the leaf is steamed.¹ Fukamushi-cha is the general name for any green tea with a long steaming time.

The ideal brewing time is about 30 seconds. Because the leaf has already been broken open by the long steaming, flavour extracts very easily, so a short infusion is all you need. Use 4g of leaves to 120ml (4 fl oz) of water, but always check the instructions on the package, as it varies from tea to tea. You can learn more about brewing delicious fukamushi-sencha here.

Water temperature. Brew at around 70°C to 90°C (158°F to 194°F), depending on the grade of the leaf. Boil the water once, then let it cool, or pour it into a yuzamashi or an empty cup first, which drops the temperature quickly.

Water type. Soft water suits Japanese tea best. Tap water in Singapore is on the soft side, which makes it well suited, but do boil it before use.

Your teapot matters more than usual. Fine particles clog a small filter almost immediately, which is the most common reason a fukamushi brews weak and pours slowly. Two things matter and they are easy to confuse. The holes need to be fine, or the sediment pours straight through. The filter also needs to be large, or it blocks. The traditional ceramic strainer, with its hand-drilled holes over a small area, tends to clog with this tea. A fine stainless mesh spread over a wide area, such as a band running around the inside of the pot or a removable basket, works far better and also drains the pot more completely, so the leaves are not left sitting in water between brews.⁸

Try it cold. The same fineness that extracts fast in hot water works beautifully in cold. The Japan Tea Central Association specifically names deep steamed sencha as one of the teas best suited to cold and ice brewing, because it brews strongly.⁹ Cold water pulls out less caffeine and fewer catechins while the sweet amino acids dissolve readily, so a cold brew tastes sweeter and much less astringent.

Storing it. Green tea deteriorates from humidity, oxygen, light, heat and absorbed smells.¹⁰ Buy in small quantities and finish a packet within two weeks to a month. Keep unopened tea in the fridge or freezer, but let it return to room temperature before opening, or condensation will form on the leaves. Once opened, store it in an airtight, light-proof container somewhere cool and dark rather than in the fridge, where it will pick up moisture and odours.¹⁰