How Kotsuru Ume Redefines the Aging of Umeshu
Time as an Ingredient: How Kotsuru Ume Redefines the Aging of Umeshu
Umeshu has traditionally been a drink enjoyed relatively soon after it is made. Green plums are steeped in sugar and alcohol, then consumed after a few months, or at most a few years. That is how most umeshu reaches the table. Its appeal lies in the fresh, vibrant character of the fruit and its sweetness, and the idea of letting it rest for an extended period has never been the norm.
Yet there is an umeshu that spends ten years in cask. It is Kotsuru Ume, produced by Heiwa Shuzou in Wakayama. Why devote so much time to a fruit liqueur? The answer lies in a deliberate attempt to redraw the boundaries of what the word “umeshu” can mean.
What Ten Years Does to a Fruit Liqueur
Kotsuru Ume begins with a base umeshu made from fully ripened Nanko plums grown in Kishu, Wakayama, and is aged for ten years.
Time quietly transforms a spirit. The youthful sweetness and sharper edges found in freshly made umeshu gradually settle with age. Through slow changes within the cask, the once-pronounced contours soften and become more rounded. The fruit character seems to concentrate, while layers of complexity emerge that were absent at the beginning. Ten years does not reshape the spirit through addition, but through subtraction.
This philosophy has long been familiar in the worlds of wine and whisky. In umeshu, however, few producers have embraced a time frame of ten years so directly.
Borrowing Time from the Cask
Another defining characteristic of Kotsuru Ume lies in its use of barrels.
The long-aged umeshu base is further matured in multiple types of wooden casks—including whisky, sherry, and bourbon barrels—before being blended. It is then bottled at full strength, without dilution. In many ways, this approach brings the maturation philosophy of whisky and sherry into the world of umeshu.
A barrel is more than a storage vessel. Compounds extracted from the wood and the effects of cask aging can contribute notes reminiscent of vanilla, caramel, and oak. The use of multiple cask types, followed by blending, creates a depth that is difficult to achieve with a single barrel alone. As a result, Kotsuru Ume unfolds from ripe plum and dried fruit into layers of vanilla, caramel, oak, and hazelnut, finishing with a long, lingering acidity. Its deep amber color tells the story of those ten years and the time spent in wood.
A New Vocabulary for an Age-Old Spirit
What this approach ultimately represents is a new way of talking about umeshu.
Traditionally described in terms of sweetness and approachability, umeshu here becomes a spirit that can be discussed using the tasting vocabulary of whisky and wine—dried fruit, vanilla, oak, and a lingering acidic finish. Kotsuru Ume was awarded Gold in the Umeshu category at Kura Master in France in 2024, followed by Platinum in 2025. The competition is judged by leading sommeliers and professionals from Michelin-starred restaurants, with food pairing as a central consideration. Winning in consecutive years and advancing to a higher award tier demonstrates that this flavor profile resonates with international professional standards of evaluation.
The producer, Heiwa Shuzou, is also the brewery that won International Wine Challenge (IWC) Sake Brewer of the Year in both 2019 and 2020. While that recognition is awarded to the brewery rather than this specific product, it indirectly reflects the depth of technical expertise that supports a project willing to commit to a decade of maturation.
A Connection to Bangkok
Bangkok’s dining scene increasingly includes professionals who are fluent in the language of whisky and wine. What makes Kotsuru Ume particularly intriguing is that it can be understood outside the conventional category of “umeshu,” and instead positioned as a mature Japanese liqueur. Multi-cask maturation, blending, and bottling at full strength are all concepts that are relatively familiar to those with a background in whisky.
There is a philosophy here of treating time itself as an ingredient. Rather than releasing a product soon after production, it is entrusted to ten years of time and to the cask, allowing its character to evolve. Kotsuru Ume continues to quietly pose a question: what, exactly, is umeshu capable of becoming? (Mr. Bacchus)
This article is intended solely to explore the blending craftsmanship and cultural heritage of Heiwa Shuzo Co., Ltd. and the Ko-Tsuru-Ume brand, and does not aim to promote or encourage the consumption of alcohol. / บทความนี้จัดทำขึ้นเพื่อนำเสนอข้อมูลเกี่ยวกับศิลปะการผสมผสานและมรดกทางวัฒนธรรมของ Heiwa Shuzo Co., Ltd. และแบรนด์ Ko-Tsuru-Ume เท่านั้น มิได้มีเจตนาเพื่อส่งเสริมหรือโฆษณาเครื่องดื่มแอลกอฮอล์ สำหรับผู้มีอายุ 20 ปีขึ้นไป โปรดดื่มอย่างรับผิดชอบ
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