What is the key cultivation technique used for Gyokuro that significantly influences its flavor profile?

Answer

Shading the bushes from direct sunlight for about three weeks before harvest.

Gyokuro is cultivated by covering the tea bushes for approximately three weeks to shield them from sunlight, which forces the plant to produce high levels of L-theanine and chlorophyll.

What is the key cultivation technique used for Gyokuro that significantly influences its flavor profile?
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