Kabusecha

Where it grows

The districts recorded against this tea, all of them in Japan. Elevation is given as the band the district is recorded at, not a measurement of the garden this leaf came from.

• Uji — 30–300 metres

  How firm this is: Inferred from general knowledge of the district rather than measured or taken from a source that states it. Uji’s tea land is low-lying by international standards; the figures here are approximate and should be replaced with a sourced range before publication.

• Ise (Mie) — 20–500 metres

  How firm this is: Inferred from general knowledge of the district rather than measured or taken from a source that states it.

• Yamato (Nara) — 200–600 metres

  How firm this is: Inferred from general knowledge of the district rather than measured or taken from a source that states it.

The plants it is made from

Cultivar is the level below the variety group: a named selection of the tea plant, propagated as clones from one parent. Most consumer writing stops at the country and the category, which leaves out the layer that decides how the leaf behaves before anyone picks it.

• Yabukita — Camellia sinensis var. sinensis

  Balanced rather than distinctive: a dependable base for sencha, which is precisely why it was planted so widely.

How it is made, in order

Read top to bottom: the list is the production sequence, and the sequence is what makes this tea its category rather than a neighbouring one. The same leaf from the same bush becomes a green tea or a black tea depending on where the heat falls relative to the bruising, so reordering these steps would not vary the tea — it would produce a different one.

1. 1. Withering — Reduces water content, softens the leaf for later handling, and permits early enzymatic and aromatic development.
2. 2. Kill-green (fixation) — Denatures polyphenol oxidase and related enzymes, arresting enzymatic oxidation.
3. 3. Rolling and shaping — Ruptures cell walls to expose leaf juices, and forms the leaf into the shape it will hold through drying and storage.
4. 4. Drying — Reduces residual moisture to a level at which enzymatic, microbial and oxidative change effectively stops, stabilising the leaf for storage.

The route it is made by

The steps above are what happens; this is the named production route they belong to, with the other teas made the same way.

• Japanese steamed green tea — Fixation by steam within hours of plucking, then a rolling sequence that dries and shapes at once — and then a second factory that turns one intake into four named teas.

  Where it is practised: Almost all Japanese green tea. Also the route for Chinese steamed greens such as Enshi Yu Lu, which use the same fixation and none of the refining tail.

What its chemistry turns on

Every true tea contains caffeine, catechins and amino acids, so listing them would say nothing about this one. What differs is what the processing above does to them — and that is the same list of steps, read for its chemistry instead of its craft.

The compounds that substantially decide what this tea is: Chlorophyll, Glutamic acid, L-theanine.

• Withering
  • creates Geraniol
  • creates Linalool
  • creates Linalool oxides
  • creates Theasinensins
  • raises Methyl salicylate
  • raises Nerolidol
  • raises Soluble sugars
  • lowers cis-3-Hexenol
  • lowers Green-leaf volatiles
  • lowers Leaf lipids
• Kill-green (fixation)
  • locks 2-Phenylethanol
  • locks Anthocyanins
  • locks Catechins
  • locks cis-3-Hexenol
  • locks Green-leaf volatiles
  • locks L-theanine
  • locks Leaf lipids
  • locks Methylated catechins
  • locks Theogallin
• Rolling and shaping
  • converts Leaf lipids
  • creates Theaflavins
  • raises Pectins
• Drying
  • creates Strecker aldehydes
  • raises Beta-damascenone
  • raises Thearubigins

These are statements about the leaf and the cup. What any of these compounds does in a body is a different kind of question and is not answered here or on the pages linked from it.

History

Shading for a shorter period than gyokuro, developed as a commercial middle ground in the twentieth century. It exists because gyokuro’s twenty-day shading is expensive and much of its character arrives in the first week.

TeaHQ synthesis — TeaHQ's own reading of well-attested general knowledge, with no single source behind it.

Brewing

• Western brewing (teapot or mug)

  1.5–2.5 g/100 ml · 60–70 °C · 1 authored infusion

  Needs: Western teapot

  Open in the brew assistant

• Kyusu brewing (Japanese style)

  3–5 g/100 ml · 50–60 °C · 3 authored infusions

  Needs: Kyusu

  Open in the brew assistant

• Cold brew tea

  1–2 g/100 ml · 4–10 °C · 1 authored infusion

  Needs: Glass teapot

  Open in the brew assistant

• Gongfu brewing (gaiwan)

  3–4 g/100 ml · 75–85 °C · 4 authored infusions

  Needs: Gaiwan

  Open in the brew assistant

• Low-temperature brewing (gyokuro style)

  6–10 g/100 ml · 50–60 °C · 3 authored infusions

  Needs: Houhin, Shiboridashi, Kyusu, Thermometer

  Open in the brew assistant

• Ice steeping (kōridashi)

  6–12 g/100 ml · 0–5 °C · 1 authored infusion

  Needs: Shiboridashi, Glass teapot, Houhin

  Open in the brew assistant

Where this tea sits in the history

Events on TeaHQ’s chronology that this tea belongs to. Each carries its date and what kind of date it is, because a good many of the confident years in tea writing are traditional ones.

• From around the sixteenth century — Uji starts shading the bushes

Vessels this tea suits

Recorded against the tea rather than against a brewing style, because the vessel does not always follow from the method — a whisk needs lateral room whatever the schedule says, and compressed leaf needs a pick before any method applies at all.

• Shiboridashi — A wide, shallow, handleless brewing dish whose filter is a set of ridges or a narrow gap moulded into the body rather than a mesh. The name describes the action — the liquor is squeezed out through that gap — and the shape describes the intent: broad and flat, so water poured in loses heat immediately.

Common mistakes

• Brewing at sencha temperature, which loses most of the shading’s effect

When the cup goes wrong

Written against green tea as a category rather than against this tea in particular, and worked back from the symptom to the likely causes in order. 37 apply to the category; the first 6 are shown.

• I bought a big bag to save money and it was stale before I finished it — A large quantity bought at a good unit price faded well before it was drunk, so the saving turned into waste.
• I bought a water filter for my tea and it changed nothing — A filter jug or tap filter was bought specifically to improve the tea, and the cup tastes the same as it did before — with the same dullness, the same film and the same scale in the kettle.
• I have too many teas open and most of them are going stale — A dozen or more packets are open at once, three or four get drunk regularly, and the rest fade quietly on the shelf until they are thrown away.
• Leaves stick to the cup, the pot and my teeth — Fine leaf clings to the inside of the vessel, comes through into the cup, and ends up in the last mouthful.
• My bamboo whisk is losing tines — Fine bamboo tines snap off during whisking and turn up in the bowl, and the whisk feels stiff and splayed.
• My cold brew tastes like faintly flavoured water — After a night in the fridge the jug is pale and tastes of very little, with none of the sweetness cold brewing is supposed to give.

Every diagnosed brewing problem

If you like this

Grouped by why they were suggested, strongest reason first. Nothing here is a blended score — a suggestion appears under the best reason that exists for it, and never under a weaker one as well.

Compare this tea with another

Written comparisons

Where TeaHQ has set this tea against another in full, rather than deriving the comparison. Each one is a written page with the points of difference argued out.

• Sencha vs kabusecha vs gyokuro — One axis — how long the bushes were covered before picking — running from none to a fortnight to several weeks. It is the single largest lever in Japanese green tea and the one least often named on a label. Put the two side by side

Journeys featuring this tea

• Discover Japanese tea — Someone who has had sencha or matcha and wants the rest of the picture.
• Understanding matcha — Someone who drinks matcha lattes, or has bought a tin and a whisk, and wants to know what the thing actually is.

Guides covering this tea

• Shade, and the two completely unrelated reasons it is used
• Amino acids and theanine: the umami and sweetness side of the leaf
• What shading does to a tea bush, and why it changes the chemistry
• Reading a Japanese tea label, field by field