酒 #6 | Koshi No Iso "Shunka Shusetsu Echizen"

Koshi No Iso "Shunka Shusetsu Echizen" — Junmai Ginjo

Koshi No Iso Brewery, Fukui Prefecture

Koshi No Iso's "Shunka Shusetsu Echizen" — the name translates as "Spring Flowers, Autumn Snow," a classical Japanese seasonal phrase (marketed internationally as "Bountiful Oceans – All Seasons") — is an ultra-dry Junmai Ginjo from the Sea of Japan coast of Fukui Prefecture. Made by a family-operated brewery in the historic Echizen region, it is a sake designed with a clear purpose: to work flawlessly alongside the fresh seafood that has defined the local food culture for centuries.

The Brewery Koshi No Iso Brewery is a family-run operation in Fukui Prefecture, on the western coast of Honshu facing the Sea of Japan. The Echizen coast has been a fishing and seafood culture for as long as it has had inhabitants, and the brewery's entire identity is shaped by that context. The name "Koshi No Iso" refers to the rocky shoreline of the old Koshi Province — now Fukui — and the sake reflects the austere, mineral character of that landscape.

Technical Specifications

• Classification: Junmai Ginjo (polished to Daiginjo standard)
• Brewing Method: Minimal filtration (loose, natural filtering process preserving pale gold color)
• Rice Variety: Gohyakumangoku
• Polishing Ratio (Seimaibuai): 50% (meets technical Daiginjo threshold, bottled as Ginjo)
• Sake Meter Value (SMV): +4.0 (distinctly dry)
• ABV: Not disclosed / standard range

Tasting Notes

• Aroma: Clean and mineral-forward — crisp rice, subtle talc, and a faint saline quality that suggests the brewery's coastal origins. Understated rather than expressive.
• Palate: Smooth entry, medium-bodied, with tight acidity and a precise, focused texture. Fruit is present but not forward — this is a savory sake built around structure rather than aroma.
• Finish: Dry, clean, and warming, with a distinctive white pepper note on the back of the throat. Long and focused.
• Appearance: Pale straw to natural oyster-gold, owing to the loose, minimal filtration method.

Brewing Method — Why It Matters A notable quirk of this sake: it is polished to 50% — the technical threshold for Daiginjo classification — yet bottled and marketed as a Junmai Ginjo. This is a deliberate choice. Daiginjo carries associations with overt fruit, high floral aromatics, and delicacy that do not fit what this sake actually is. The brewery's identity is dry, coastal, and purposefully restrained. The looser filtration process, which preserves the slight golden color and a rounder texture, further distinguishes it from the typical highly polished, crystal-clear Daiginjo style.

How to Serve

• Temperature: Serve chilled (42–48°F) to preserve the sharp mineral structure and peppery finish. Avoid warming — heat would flatten the acidity that gives this sake its defining character.
• Vessel: A white wine glass works well; a standard sake glass is equally appropriate. The pale gold color is worth noting.

Food Pairings This is the most food-specific sake in the study — built for seafood, but versatile within that frame:

• Sashimi — particularly white fish (flounder, sea bream), the pairing the brewery intended; the sake's dryness amplifies rather than competes
• Raw oysters — the saline mineral quality of the sake aligns almost perfectly with the brine of a fresh oyster
• Grilled or steamed shellfish — clams, mussels, or scallops with minimal seasoning; the white pepper finish adds a natural seasoning dimension
• Ceviche or aguachile — the crisp acidity bridges Latin seafood preparations beautifully
• Standalone aperitif — the dry, focused profile and clean finish make it an exceptional pre-meal sake without food

Bottle & Availability Standard 720ml and 300ml formats. Available at specialty sake retailers and Japanese import-focused bottle shops.