No.6 The Oldest Sake Yeast Used in Modern Brewing

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No.6 The Oldest Sake Yeast Used in Modern Brewing

Aramasa Shuzo · Akita Prefecture, Japan

At a glance

Producer
Aramasa Shuzo
Region
Akita Prefecture, Japan
Grape variety
Japanese Rice (Junmai Daiginjo, Sake No.6 Yeast)
Wine type
Fortified
Body
Light-bodied and Delicate
Sweetness
Dry
Typical price
$80-130 (750ml, direct import)

Tasting profile

Expressive nose of white florals, melon, pear, subtle rice notes, a hint of fennel and fresh herbs; palate is precise, lightly creamy, with focused umami and mineral finish.

Evolution: Over time, rice umami deepens, floral and aromatic top notes may mellow, gaining subtle complexity but losing vivid freshness.

At peak: At peak, shows high definition aromatics, electric acidity (by sake standards), and crystalline precision emblematic of No.6 yeast.

Structure

Acidity
Moderate to bright (high for sake standards)
Tannins
None (Sake; no grape tannins present)
Alcohol
15-16% ABV (typical for sake of this style)
Aging potential
Low to moderate - intended for youthful vibrancy, 3-5 years optimal

Drinking window

Peak drinking
2025 to 2027
Optimal window
2024 to 2028
Current status
Drinking well in youth; style shows best within first 3-5 years
Current condition
Pristine, fresh, vivid aromatics and minerality; vibrant texture

This sake is valued for its pure, vibrant expression of a historic yeast strain (Sake No.6). Drinking within 1-3 years preserves the hallmark aromatics and clarity. Beyond this, oxidative and mellowed notes may appeal to some, but vibrancy will soften.

Food pairing

Outstanding with sushi, sashimi, shellfish, white-fleshed fish, young goat cheese, light Japanese cuisine (chawanmushi, tempura). Also complements mild, umami-driven vegetarian dishes.

Serving

Serving temperature
8-12°C / 46-54°F (serve slightly chilled in a tulip glass or white wine stem for best aromatics)
Decant
Not required

Sustainability

Sustainability score: 7/10

Traditional brewing, use of local rice and proprietary yeast; some emphasis on environmental stewardship, but not fully certified organic or biodynamic. Recent trend toward lighter, eco-conscious packaging but not industry-leading. No evidence of renewable energy or formal water conservation reporting.

Compared to global wine standards, Aramasa Shuzo shows respect for natural resource use and local ecosystems, but lacks formal third-party sustainability certifications. Local sourcing and traditional production reduce some impact, but glass bottle use, lack of detailed emissions data, and necessary international freight for exports all temper the overall score. Not a leader in global beverage sustainability, but not egregious either—mid-range on responsible practices.