Compare two teas
Side by side across seven dimensions. There is no verdict and no winner — the purpose is to understand the difference, not to be told which to buy.
Why these two get confused
Both described as fermented tea and produced by entirely different mechanisms — lactic acid in one case, mixed microbial piling in the other.
TeaHQ has written about this pair
'Fermented' is used for so many different operations in tea that the word has stopped carrying information. These three genuinely are fermented, by three different routes, and only one of them is what most people mean by the term.
- What actually happens
- Goishicha: Two fermentations in sequence: a mould fermentation, then a lactic-acid fermentation under weight.Shou pu-erh (ripe): Leaf is heaped, dampened and covered; microbial activity raises the pile temperature over weeks and transforms it.
- Where it is made
- Goishicha: Kochi prefecture, Japan, in very small quantity.Shou pu-erh (ripe): Yunnan, industrialised in Menghai.
- What it tastes like
- Goishicha: Sour plum, hay and fermented grain. Distinctly sour and clean.Shou pu-erh (ripe): Damp earth, dark chocolate, dried date and old wood. Thick, sweet, no drying.
- How it is consumed
- Goishicha: Brewed, traditionally in a communal pot and often with rice.Shou pu-erh (ripe): Brewed, in many short infusions.
- What the sourness means
- Goishicha: Sourness is the defining and intended character.Shou pu-erh (ripe): Sourness in shou is a fault or a sign of a young, unrested pile.
- Relation to oxidation
- Goishicha: None.Shou pu-erh (ripe): None. This is microbial work on finished leaf, not enzymatic browning.
- How old the practice is
- Goishicha: A regional survival, made by very few producers.Shou pu-erh (ripe): Comparatively recent; wet-piling was developed to approximate in weeks what raw pu-erh takes decades to do.
In summary: The useful distinction is not fermented versus unfermented but which organisms and what they leave behind. A shou that tastes sour is behaving like a lactic-fermented tea and that is a signal something went differently in the pile; a goishicha that tastes sour is correct. Knowing which is which is the difference between returning a tea and understanding it.
Point by point
| Dimension | Goishicha | Shou pu-erh (ripe) |
|---|---|---|
| Category | Dark tea and pu-erh · not applicable · post-fermented (microbial aerobic then anaerobic) | Dark tea and pu-erh · not applicable · post-fermented (microbial wet piling) |
| Production | In order: Steaming (Japanese fixation) → Wet piling (wo dui) → Anaerobic pickling → Compression → Sun-drying (shai qing). mature leaf and summer harvest. | In order: Withering → Kill-green (fixation) → Rolling and shaping → Sun-drying (shai qing) → Wet piling (wo dui) → Compression. |
| Origin | Japan | China |
| Flavour | fruity and earthy. light and smooth in the mouth. Aroma: sour plum, hay, fermented grain. Moderate in character. Moderate in intensity. | earthy, woody, sweet and chocolate. full bodied, smooth and rich in the mouth. Aroma: damp earth, forest floor, date, dark wood, cocoa. Moderate in character. Moderate in intensity. |
| Brewing | Boiling and decoction: 0.5–1.5 g/100 ml at 95–100 °C, first steep 600s. Western brewing (teapot or mug): 1.5–2.5 g/100 ml at 95–100 °C, first steep 180s. Boiling aged and dark tea (zhu cha): 0.8–1.5 g/100 ml at 95–100 °C, first steep 600s. | Gongfu brewing (gaiwan): 5–8 g/100 ml at 98–100 °C, first steep 5s of 6 authored. Western brewing (teapot or mug): 1.5–2.5 g/100 ml at 98–100 °C, first steep 240s. Gongfu brewing (Yixing pot): 5–7 g/100 ml at 98–100 °C, first steep 10s of 6 authored. Boiling aged and dark tea (zhu cha): 0.8–1.5 g/100 ml at 98–100 °C, first steep 300s. |
| Cultural context | Used in Miang — chewed fermented tea in northern Thailand and Laos. | Used in Chinese tea house culture, Pu-erh ageing and collecting culture, Gongfu cha and Yum cha. |
| Who may prefer it | Someone who wants presence without being dominated and is willing to drink something several times before it makes sense. It rewards attention to leaf weight and timing. | Someone who wants presence without being dominated and wants to enjoy it on the first cup. It tolerates an imprecise brew. |
Nothing above is a recommendation. The last row describes the drinker each tea suits, using each tea’s own authored fields and the same sentence structure for both, so neither can be framed as the safe choice.