Verdict
I cannot reconstruct every aroma or flavor from memory. What remains unmistakable, however, is that this was a very good sake.
Furosen Yamahai Junmai Ginjo Kame-no-o was served immediately after Seikyo at the same table, yet it never disappeared behind the preceding glass. Its clean acidity, pleasantly assertive bitterness, and yamahai-derived richness retained a clear outline. The sake had weight without becoming clumsy, while its bitterness acted as an accent rather than an intrusion.
The lasting impression is not a list of tasting descriptors but a sense of structure: depth on entry, clarity through the middle, and a surprisingly brisk exit.
First Impression
Tasting order matters. After a sake with a distinct presence, the next pour can easily seem muted or blurred. This Furosen faced precisely that disadvantage, but its character was still immediately legible.
What stood out most was the combination of clean acidity and comfortable bitterness within a dense, savory frame. This was not a sake relying on sheer alcoholic force. Each element helped define the others: acidity gave direction to the richness, while bitterness sharpened the rice-derived sweetness and umami.
The exact aromatic details have faded, but the balance has not. Sometimes that is the more revealing memory. A sake may resist perfect verbal reconstruction while leaving no uncertainty about its quality.
Quick Profile
Name: Furosen Yamahai-jikomi Junmai Ginjo Kame-no-o Muroka Nama Genshu
Brewery: Uehara Shuzo
Origin: Shin-asahi, Takashima, Shiga Prefecture
Style: Yamahai junmai ginjo, unfiltered, unpasteurized, undiluted
Rice: Shiga-grown Yamada Nishiki, 6%, used for the starter; Iwate-grown Kame-no-o, 94%, used in the main mash
Rice polishing ratio: 55%
Yeast: Brewery-resident yeast
Alcohol: 17%
Sake meter value: +3
Acidity: 2.0
These specifications are taken from the photographed back label.
Official Website
Tasting Notes
At the center of the sake was the concentration associated here with yamahai brewing and a nama expression. Yet concentration alone does not explain why it worked. A clean line of acidity passed through that density, keeping the palate alert and preventing the sake from feeling static.
The bitterness was equally important. It was clearly perceptible but did not register as an unwanted rough edge. Instead, it tightened the sweetness and depth of the rice, giving the middle palate greater definition. Even the bitterness became a source of pleasure: an accent that made the rest of the sake more vivid.
Rice-derived richness and sweetness spread across the palate before giving way to a fresh, clean aftertaste. Despite the initial breadth, the finish did not linger heavily. The sake seemed to gather itself and disappear with unexpected speed.
Kame-no-o’s character was most apparent not as a single identifiable flavor, but through this three-dimensional relationship among acidity, bitterness, and grain-derived depth. The result felt substantial and articulate, even after another sake had already made its impression.
Drinking Context
The bottle was served well chilled, as the condensation in the photograph shows. That is a logical starting point for an unfiltered nama genshu: the low temperature brings its acidity and bitterness into focus while containing its considerable density.
This is not, however, a sake that seems dependent on being extremely cold. Allowing it to rise gradually in temperature should reveal more of its sweetness and rice-centered breadth. Following that development over the course of a meal would likely be more rewarding than rushing through a single small pour.
Its combination of acidity, bitterness, and umami suggests food with substance. Grilled fish, charcoal-grilled chicken, or dishes seasoned with miso and other fermented ingredients would give the sake something to work against. The acidity could refresh the palate after oily textures, while the bitterness should connect naturally with charred skin, browned edges, and savory fermentation.
This is the kind of bottle that makes particular sense at a Japanese counter, where successive dishes and successive sakes create a cumulative tasting experience. Its ability to remain distinct in that flow is part of its appeal.
Cultural / Technical Context
The back label gives an unusually specific account of the rice composition. Shiga-grown Yamada Nishiki accounts for 6% of the total and is used in the shubo, or fermentation starter. Iwate-grown Kame-no-o makes up the remaining 94% and is used in the main mash. It would therefore be imprecise to describe this simply as a sake made exclusively from Kame-no-o.
Yamahai is often reduced to shorthand such as “powerful,” “wild,” or “high in acidity.” Those descriptions can be useful, but they do not capture what mattered in this glass. Here, richness was organized by acidity and bitterness, while the finish remained unexpectedly clean. The method contributed to structure rather than merely intensity.
The brewery-resident yeast, 17% alcohol, unpasteurized condition, and lack of dilution all provide relevant context for the sake’s presence. They should not be treated as a mechanical formula for flavor, but together they help explain why the sake could appear concentrated and lively without losing its composure.
Why This Matters in Japan
This bottle makes its strongest argument in context rather than in isolation. It was encountered after another sake and amid the progression of a meal, yet remained easy to recognize. That resilience is valuable in Japan, where sake is often experienced through an evening of changing dishes rather than as a solitary tasting sample.
Just as importantly, Furosen knew when to withdraw. It showed rice sweetness, depth, acidity, and bitterness, then left a fresh impression instead of imposing an exhausting finish. That combination of presence and restraint invites another bite and another sip.
Drinking it with food in Japan would therefore reveal more than a list of technical specifications. It would show how a dense, distinctive sake can participate in the rhythm of a meal without surrendering its own identity.
Brewery Perspective
Uehara Shuzo is based in Shin-asahi, Takashima, on the northwestern side of Lake Biwa. The brewery places yamahai at the center of its identity and describes an approach that cultivates yeast present within the brewery rather than adding cultured yeast to its yamahai starters. It also continues traditional wooden fune pressing with a lever-weighted system.
The brewery speaks of its preferred style as umakuchi: a sake defined neither simply as dry nor sweet, but by satisfying rice flavor and savory depth. Its own description emphasizes richness and sweetness spreading across the palate, followed by a refreshing aftertaste that quickly recedes. That closely matches the remembered movement of this bottle.
The overlap is significant. It suggests that the drinker’s impression and the brewery’s intended style arrived at the same point independently: fullness without sluggishness, and flavor that remains clear before making a disciplined exit.
That philosophy provides a compelling reason to seek out Takashima itself. Experiencing the landscape and food culture around the brewery would give the sake a more tangible setting, particularly for a producer whose methods depend so strongly on its brewery environment. Even without claiming that every detail of this particular bottle can be reconstructed, its sense of place and purpose remains convincing.
Location: Takashima City Tourism and Local Products Plaza
日本酒の感想は、いつも明瞭な言葉として残るわけではない。香りや味わいの細部を思い出せなくても、「これはおいしかった」という感覚だけが、妙に確かなまま残ることがある。
今回の「不老泉 山廃仕込 純米吟醸 亀の尾 無濾過生原酒」が、まさにそうだった。同じ席で誠鏡に続けて飲んだ酒である。先に印象のある一杯を味わった後では、次の酒の輪郭がぼやけても不思議ではない。それでも不老泉のおいしさは、はっきりと分かった。
印象の中心にあったのは、きれいな酸味と心地よい苦味、そして山廃仕込みらしい濃醇さだ。厚みはあるが、ただ重いのではない。酸味が酒の芯を通り、苦味が米の甘味とコクを引き締める。その苦味すら雑味ではなく、味わいを際立たせるアクセントとして機能していた。
口に含むと、米のコクと甘さが豊かに広がる。しかし、濃醇な印象をいつまでも押しつけることはない。後口には爽やかな余韻を残しながら、最後は意外なほど素早く消えていく。広がりの大きさと引き際のよさ。その対照が、この酒を印象深いものにしていた。亀の尾の持ち味も、単一の香味というより、酸味、苦味、米の厚みが共存する立体的な酒質として感じられた。
裏ラベルによれば、酒母には滋賀県産山田錦、もろみには岩手県産亀の尾を使用。精米歩合は55%で、蔵付酵母による山廃仕込み、日本酒度は+3、酸度は2.0、アルコール分は17度。無濾過生原酒という仕様も、この酒の密度と鮮明さを理解する手掛かりになる。ただし、数値だけでは、濃醇さと爽快な消え際が両立する面白さまでは説明できない。
まずは冷酒で酸味と苦味の輪郭を確かめ、温度が少しずつ上がるにつれて米の甘味が開く様子を追ってみたい。焼き魚や鶏の炭火焼、味噌などの発酵調味料を使った料理にもよく合いそうだ。酸味が脂を切り、苦味が焼き目の香ばしさと響き合うだろう。料理と酒を重ねていく日本の食卓だからこそ、前の一杯に埋もれない強さが生きてくる。
醸造元は、滋賀県高島市新旭町の上原酒造。山廃仕込みと木槽天秤搾りを大切にし、単なる辛口や甘口ではない「旨口」を掲げる蔵だ。米の味を十分に見せながら、爽やかな余韻を残して消えていくという蔵元の目指す酒質は、今回の記憶ともよく重なる。
細かな香味を覚えていないことは、必ずしも失敗ではない。言葉になる前の段階で、なお確かに残るおいしさがある。不老泉は、誠鏡の後でも自らの輪郭を失わず、そのことを静かに証明した一本だった。
公式サイト:上原酒造
