Mu-tenka (無添加)
"No additives" — the Japanese-language term central to natural-wine labeling
What It Means
Mu-tenka (無添加) literally means "no additives." On a Japanese wine label or technical sheet, the term is used to indicate that the wine has been made without one or more standard winemaking additions:
- Sulfur dioxide (SO₂) — most common application
- Fining agents (egg white, isinglass, bentonite)
- Sterile filtration
- Concentrated must, sugar, or acid additions
The exact scope depends on the producer’s specific claim. A bottle labeled 亜硫酸無添加 (asaensan mu-tenka, "sulfite-free") makes a narrower claim than one labeled simply 無添加. The label may also be paired with related terms:
- 無濾過 (mu-roka) — unfiltered
- 無清澄 (mu-seichō) — unfined
- 自然派 (shizenha) — "natural school," the broader natural-wine descriptor
Difference from "Natural Wine"
The European term "natural wine" is broader than mu-tenka and somewhat fuzzier. It typically implies low-intervention farming (organic / biodynamic / grass-cover), indigenous-yeast fermentation, minimal SO₂, and minimal filtration — but no specific producer of natural wine in France or Italy is required to make every wine fully zero-additive.
Mu-tenka in Japan is more specific and more legally precise. It is a back-label claim with implications for what the producer has actually done; making the claim falsely would be a labeling violation. As a result, Japanese natural-wine drinkers tend to read mu-tenka labels with confidence that the claim is real.
Producers Who Use It
Mu-tenka labels appear most commonly on:
- Hokkaido small-domain wines (Domaine Mont, several 10R alumni)
- Yamagata and Tohoku natural producers
- Domaine Hide and other Katsunuma natural producers
- Coco Farm’s natural-leaning cuvées
- Hitomi Winery (Shiga, Iwatani) — Delaware natural specialist
Why It Matters
Mu-tenka is the most precise term in Japanese wine vocabulary for genuinely additive-free production. Drinkers in Japan rely on it the way some European drinkers rely on "vin nature" — but with more confidence in its specificity. For producers, the willingness to make the mu-tenka claim is a meaningful signal that they have committed to natural-wine production at the technical level, not just marketing it.
Details
- Literal meaning: "No additives"
- Common scope: Sulfite-free, sometimes also unfiltered/unfined
- Related terms: 無濾過 (unfiltered), 無清澄 (unfined), 自然派 (natural school)
- Distinguishing feature: More legally specific than "natural wine"