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.

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2025/8/19

Wine Minerality | Exploring the True Nature of “Taste,” “Aroma,” and “Sensation” in Mineral Character

When drinking wine, there is an expression you will inevitably encounter somewhere along the way: “mineral character” or “minerality.” Even those who haven’t heard these terms yet will almost certainly encounter them in the relatively near future, as they …

oenology thorough-explanation

2025/8/17

Complete Guide: Rosé Wine Production Methods and Their Characteristics

I once encountered an observation that “rosé wines are difficult to imagine even when you know their origin and grape variety.” While this is a fascinating perspective, as someone actually involved in winemaking, I find myself thinking, “Yes, that might i …

viticultur

2025/8/16

How Long Will Premium Vineyards Remain Premium? | Vineyard Location

On September 12th, the winery where I work harvested grapes for the first time in the 2019 season. While grape growth wasn’t as abnormally accelerated as in 2018, when the harvest came nearly a month earlier than usual, 2019 still marked the beginning of …

viticultur

2025/8/14

Understanding Soil in Wine

When introducing wines in Japan, it seems that reference to the type of soil in which the grapes were cultivated is frequently made as one of the elements expressing a wine’s character. While this tendency is not limited to Japan alone, it appears particu …

oenology

2025/8/14

Where Does the Iron Taste Come From? An Exploration of Minerals

Recently, I had the opportunity to taste wines at a winery located in Enzan, Yamanashi Prefecture. During the tasting of several wines from their lineup, one particular characteristic struck me strongly: the taste of iron. When I asked the winemaker about …

thorough-explanation

2025/8/8

A Comprehensive Guide to Phenols and Tannins in Wine

Minerals and tannins. Can anyone truly claim they have never used these terms? That’s how established minerals and tannins have become as tasting expressions in wine. However, few people can properly explain the specific meanings these expressions refer t …

oenology

2025/8/6

Why Do Wines Taste Bitter?

Have you ever found a wine to taste “bitter”? How about sake—have you ever experienced bitterness when drinking it? When drinking alcoholic beverages, we occasionally encounter bitterness. Have you ever wondered why this happens? What would you think if t …

oenology

2025/8/5

Can Concrete Transform Winemaking?

Attention is returning to wines that are fermented and aged in concrete vessels. Concrete is a building material very familiar to modern people. While concrete is strongly associated with building exteriors and walls, in winemaking it serves as a material …

viticultur

2025/8/5

Is Germany the Northern Limit of Viticulture?

When people begin studying wine, many learners are taught that “wine grape cultivation takes place between 30° and 50° North latitude and 30° and 40° South latitude,” aren’t they? Then, when they move on to the chapter dealing with German wines, they like …

oenology

2025/8/1

Wine, Acids, and Lactic Acid Bacteria | Understanding MLF

Acids are indispensable elements in wine. However, acids are inappropriate whether they are too abundant or too scarce. The overall balance is extremely important. Wine contains multiple acids, but from a winemaking perspective, tartaric acid and malic ac …