Nagi

Holds a degree in Viticulture and Enology from Geisenheim University in Germany. Served as Head Winemaker at a German winery. Experienced viticulturist and enologist. Currently working as an independent winemaker and consultant specializing in both viticulture and enology.

off-flavor qualitycontrol

2025/11/13

Malolactic Fermentation and Wine Off-Flavors | The Dual Nature of MLF

Malolactic fermentation (MLF) is an oenological technique actively employed to reduce wine acidity and impart distinctive aromatic characteristics and nuances. MLF represents one of the microbial-mediated approaches in winemaking, and its appeal as a more …

sparklingwine

2025/11/12

The Science of Bubbles: Understanding the Mechanism Behind Sparkling Wine’s Appeal

Sparkling wine is an indispensable element of celebrations and gatherings, extending far beyond Christmas and New Year festivities. The sight of bubbles ascending through a flute glass alone can evoke a sense of festivity in the consumer. Sparkling wine i …

fermentation thorough-explanation

2025/11/11

A Comprehensive Guide to Wine Yeast: The Fundamentals

Two essential components are indispensable for winemaking. One is grapes, the raw material. The other is yeast. Yeast is utilized in the production of fermented beverages such as wine, beer, and sake. It is also employed in the fermentation of bread dough …

thorough-explanation

2025/11/10

The Future of Wine? A Comprehensive Analysis of PIWI Varieties

Among wine professionals, grape varieties have increasingly become a topic of discussion. Grape varieties have long been subjects of debate regarding their relationship to selling prices, compatibility with cultivation regions, and the correlation between …

wine

2025/11/9

Does Wine Glass Selection Alter the Taste of Wine?

Recently, a wine glass produced by a renowned Master of Wine (MW) was introduced in Japan, garnering considerable attention. This particular MW has consistently used the same glass for both red and white wines throughout many years of professional practic …

wine

2025/11/9

Glass Shape and Wine Perception: Does Glass Form Alter Wine Enjoyment?

Many wine enthusiasts find their cupboards filled with an extensive collection of wine glasses. Others may appreciate wine bars that serve wines in multiple glass types tailored to different wines. The marketplace offers an extraordinary variety of wine g …

off-flavor

2025/11/8

How Light Changes Wine Aroma | Light-Struck Flavor

Light-struck flavor, or “nikkoushuu” in Japanese. The name might evoke images of freshly laundered white sheets fluttering under a clear blue sky, or the pleasant scent of sunshine when wrapped in those sheets. Unfortunately, that is not what this term re …

Amphora Historically Archaeology  - Makalu / Pixabay

oenology qualitycontrol

2025/11/7

The Relationship Between Wine, Tradition, and Vessels | Examining the Meaning of Qvevri and Bocksbeutel

There are vessels that have been traditionally used in winemaking for centuries. When we think about it carefully, there may be cases where we cannot clearly explain why we continue to use them. Why do we use qvevri? What makes Bocksbeutel superior to ord …

column

2025/11/6

The Outside World is Filthy

The Reality of Microbial Contamination How many of you have ever heard the term “microbial contamination”? Working in winemaking, albeit in a small corner of the world, one encounters various challenges. Wine often carries an image of luxury and high soci …

wine

2025/11/5

Is It Really True That Wine Tastes Different from Vineyard to Vineyard?

When discussing the taste of wine, haven’t you often heard the phrase “wine tastes different from vineyard to vineyard”? In fact, this statement merely describes something extremely obvious. What’s more, if you find yourself convinced by this narrative, y …