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Beverage Terroir · VI The Beverage Tradition · Beverages & Drinks

Sencha Production Grades and Brewing Mastery

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I

Origin

Japan — steaming technique for green tea developed in Japan (vs. Chinese pan-firing) documented from 8th century; sencha style formalised by tea merchant Nagatani Soen in 1738 in Uji

II

Description

Sencha—Japan's most-produced and most-consumed green tea (approximately 75% of all Japanese tea production)—encompasses an enormous quality and flavour spectrum from mass-produced commodity tea to the extraordinary single-origin, single-harvest teas from Uji, Yame, and Shizuoka estates that are treasured as fervently as grand cru wines. The sencha production process involves hand-harvesting or machine-picking young shoots, immediately steaming to halt oxidation (the key distinction between Japanese green tea and Chinese pan-fired green tea), then rolling and drying to produce the characteristic needle-like leaf shape. The steaming duration is the primary process variable: standard (asamushi)—30 seconds; medium (chumushi)—45–60 seconds; deep (fukamushi)—60–120 seconds. Each produces different visual and sensory qualities. The brewing variables—water temperature, steeping time, leaf-to-water ratio—critically determine the experience: lower temperature (60–70°C) extracts amino acids (L-theanine and glutamate for umami) while suppressing tannin-catechin bitterness; too-high temperature produces harsh, bitter tea even from premium leaf.

III

The Thread

—Both Longjing and premium sencha require precise low-temperature (70–80°C) brewing to extract amino acids without excessive catechin bitterness—the temperature-as-technique principle is identical despite different processing methods Chinese
—Both Darjeeling first flush and Japanese first-flush sencha are delicate, amino-acid-rich teas requiring lower brewing temperatures than full-oxidised teas—both reward temperature precision with dramatically superior cups Indian
—Both Taiwanese high-mountain oolong and Japanese premium sencha reward multiple sequential infusions at progressively increasing temperature—the concept of 'reading' a tea through sequential brews is shared Taiwanese
IV

Flavour Context

Premium sencha: umami-rich L-theanine sweetness; grassy freshness; clean astringency; umami-amino finish. Mass sencha: grassy, moderate astringency. Fukamushi: thick, savoury, minimal grassiness. Temperature determines everything

Pillars V — VII
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