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Distillery: 石本酒造 Ishimoto Shuzō

​Address: 〒950-0141 Niigata, Konan Ward, Kamedakogyodanchi

Website: https://koshinokanbai.co.jp/

Additional Content: Not much other than this one review of the 10 yr Otsujyōchū

Name: 乙焼酎10年 Otsujyōchū 10yr

Type: 酒粕焼酎 Sake Kasu shōchū
常圧蒸留: 単式蒸留 (Pot Distillation)

Ingredients:

  • 米(国産)Rice (Domestic) 

  • 酒粕 Sake Lees

Alcohol: 43%

Koshi no Cap_edited_edited_edited_edited

In the bottle: Otsujyōchū starts off soft, subtle, and neutral—hard to tell there’s anything on the nose at first. But with a little oxygen, very light pear, peach, and sake notes float to the surface. If you inhale deeply, you can just barely catch the 43% alcohol—it’s there, but so restrained it adds to the mystery rather than overpowering. The overall nose is clean, understated, and intriguing, leaving you curious about what’s in the glass.

On the rocks: Smooth and thick, with a nice balance between sharp and sweet—never falling too heavily on either side. Unlike other kasutori or sake kasu shōchū, the typical sake notes are less pronounced here. You can catch some lychee, licorice, and vanilla, nicely counterbalanced by mature earthy notes that finish with a really pleasant sweetness. The 43% alcohol adds gentle warmth without dominating, making this a refined and enjoyable pour over ice.

Straight: Intense is the best way to describe the start—the sharpness is right up front, but it settles quickly, giving the subtler notes some breathing room. What I enjoyed most was the finish: you can catch some really amazing flavors lingering for a minute or two after drinking. The higher proof shows more clearly here, but it stays smooth and controlled, letting the sake-like fruit and earthy depth come through without harshness.

水割り Diluted with water

4:1 ratio: This mellows out quite a bit, and the added water helps some of those beautiful sake notes (pear, peach, lychee) come to the surface, resulting in a really nice drink to sip. My preference is on the rocks for the bigger punch, but if I was going to have more than one glass, adding a splash of water or letting the ice melt halfway would be my choice. It keeps the shōchū light and approachable without losing too much character.

Paired with chocolate: Vietnam 75% dark chocolate. Now this is a match made in heaven. The sweetness of Otsujyōchū opens up the dark, rich chocolate to create an amazing combination that reminds me of a chocolate ganache or a chocolate tart with vanilla and fruit. Absolutely sublime—the shōchū’s subtle fruit and vanilla lift the cocoa without clashing, and the finish lingers beautifully with layered richness. A standout pairing that turns the pour into something almost dessert-like.

Enjoy straight or on-the-rocks

Reflections on this shōchū

  • Saw this bottle a few times over the past year and passed on it, mainly because of a past purchase of sake kasu shōchū from another famous sake maker which, while not bad, did not justify the price. This one was nearly double that price, so I was hesitant; however, the result was much better this go around.

  • The quality here clearly stands out—the refinement, balance, and depth make it feel worth the step up. It’s a reminder that not all high-end sake kasu shōchū are created equal, and this one delivers on the promise with elegant sake notes (fruity, floral, subtle custard) in a distilled, smooth format that’s easy to enjoy slowly.

  • Really been enjoying the pairing of rice-type shōchū with chocolate, and this time was no exception. The chocolate brings out richer cocoa layers, while the shōchū adds warmth, vanilla, and subtle fruit that complement without clashing. I wonder at what point someone starts using this in dessert making—whether as an ingredient in a ganache, a soak for cake, or even a reduction for sauce. The richness and balance seem perfect for that kind of application.

Bottle label and Information

Front Label

Back Label

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