Green Tea
What Is Green Tea?
What is green tea? The unoxidized tea made by heating fresh leaves to preserve color, catechins, and fresh flavor. Chinese vs Japanese processing methods.
Introduction
Green tea is defined by what does not happen to it: {{glossary:oxidation}}. After plucking, fresh leaves are quickly heated to deactivate the polyphenol oxidase enzyme, preserving the leaf's green color, fresh aroma, and high {{glossary:catechins}} content. This simple principle — stop oxidation before it starts — produces the world's most consumed tea category.
Chinese vs Japanese Methods
The two dominant green tea traditions differ in how they achieve fixation. Chinese green teas are pan-fired (chao qing) in hot woks or drum roasters, producing a toasty, nutty, sometimes chestnut-like character. The leaf tends to be hand-shaped into distinctive forms: flat (Longjing), rolled pearls (Bi Luo Chun), or twisted needles (Mao Feng). Japanese green teas are steamed (mushisei), preserving a brighter, more vegetal, umami-rich profile. The leaf is typically rolled into thin needles (sencha) or ground to powder (matcha).
Flavor Profile
Green tea's unoxidized chemistry produces a distinctive flavor spectrum: vegetal (spinach, asparagus), marine (seaweed, ocean), nutty (chestnut, almond), floral (jasmine, orchid), and sweet (honey, brown sugar). Japanese greens tend toward the vegetal-marine end; Chinese greens toward nutty-floral.
Health Significance
Because oxidation converts catechins into theaflavins, green tea retains the highest concentration of intact catechins — particularly {{glossary:egcg}} — making it the most studied tea type for health benefits. However, the catechin content also means green tea is the most sensitive to brewing errors: water that is too hot or steeping too long extracts excessive catechins, producing harsh bitterness.
Global Production
China produces approximately 45% of the world's green tea, Japan 5%, and the remainder comes from Vietnam, Indonesia, and other Asian nations. Green tea accounts for roughly 30% of global tea production by weight but is growing faster than other categories.