Teas / green / Boseong Daejak ("Big Sparrow")

Boseong Daejak ("Big Sparrow")
🇰🇷 South Korea

Boseong Daejak ("Big Sparrow")

보성 대작 · 寶城 大雀

pan-fired

Boseong Daejak ("big sparrow") is the fourth and largest grade in the Korean four-tier "sparrow" classification (Ujeon → Sejak → Jungjak → Daejak), made from late-flush summer leaves — larger, more mature, lower in amino acids than the spring-pick Ujeon and Sejak. The market position is the everyday commodity grade: lower price, more accessible, and a more robust cup that holds up to food. Boseong is Korea's largest tea region, and Daejak makes up a substantial fraction of the region's volume (despite Sejak getting most of the publicity).

Quick facts

Region
Boseong
Harvest year
2025
Harvest season
summer
Cultivars
Yabukita

Brewing

Leaf
3.5 g / 100 ml
Water
85°C
Rinse
no
Gongfu steeps (s)
60, 90, 120
Western (min)
2.5

Daejak tolerates much hotter water (up to 90 °C) than Ujeon or Sejak because the late-flush leaves are larger, lower-amino-acid, and don't extract bitterness as fast. The everyday "drink with food" Korean green.

Calculate leaf weight for this tea

Tasting notes

Aroma
hay, light grass, faint nut
Flavor
robust, slightly grassy, mild astringency, low umami
Mouthfeel
light, brisk
Finish
clean, faintly sweet

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