Japanese Mugicha and Barley Infusions: Summer Cold-Brew Culture and Non-Caffeinated Tradition
Japan — nationwide, medieval origins
Mugicha — roasted barley tea — is the default cold drink of summer in Japan, the beverage of children and elders, the cooling companion to festival foods. Unlike green tea, mugicha contains no caffeine, making it appropriate for family meals and evening service. Its flavour — roasted, slightly bitter, gently sweet, with cereal and smoke notes — bridges the sensory worlds of coffee and herbal infusion. The roasting process drives Maillard browning producing pyrazines and maltol — the same compounds that give popcorn, coffee, and roasted bread their aromas. Cold-brewed mugicha (cold water, 6-8 hours refrigerated) produces a cleaner, less bitter result than hot infusion — the contemporary standard. Beyond mugicha, the broader category of grain teas (sobacha/buckwheat tea, koshihikari genmai/rice grain teas) reflects Japan's tradition of infusing roasted grains as alternatives to leaf tea.