Kai Noir (甲斐ノワール)
Yamanashi’s 1990s red cross — Black Queen × Cabernet Sauvignon, designed to produce serious Japanese reds
The Variety
Kai Noir (甲斐ノワール — kai is the historical name for Yamanashi province, noir the French for black/red) is a Japanese-bred red wine grape developed at the Yamanashi Prefectural Fruit Tree Experiment Station. The cross was made in 1990 from Black Queen (the Kawakami cross) and Cabernet Sauvignon. The variety was registered and released for cultivation in 1992.
The breeding logic was straightforward: Black Queen contributed deep color, high acid, and Japanese-climate adaptability (especially disease resistance from its Bailey grandparent); Cabernet Sauvignon contributed structure, tannin, and the Bordeaux-variety aromatic register.
Style
Kai Noir wines are deeply colored, structured, with a tighter tannin frame than pure Black Queen and a more restrained aromatic than pure Cabernet Sauvignon. Vinification varies — some producers treat it as a structured solo wine with serious oak; others use it as a blender to add color and structure to lighter Japanese reds.
The variety performs particularly well at higher-elevation Yamanashi sites and in the Yatsugatake foothills, where cooler nights preserve acid and the diurnal swing supports tannin development.
Where It’s Grown
Yamanashi Prefecture (its home), with smaller plantings spreading into adjacent Nagano. Total plantings are still modest but expanding. Kai Noir is one of the GI Yamanashi approved varieties.
Why It Matters
Kai Noir is a successful contemporary update of the Kawakami breeding model — using a Kawakami cross (Black Queen) as one parent and a serious European variety (Cabernet Sauvignon) as the other. The result is a variety distinctly suited to Japanese conditions, not a compromise. Together with Yama-Sauvignon (Yamabudou × Cab Sauv) and Kai Blanc, Kai Noir represents the ongoing project of "designing Japanese fine-wine grapes for Japanese conditions."
Details
- Color: Black
- Parents: Black Queen × Cabernet Sauvignon
- Bred at: Yamanashi Prefectural Fruit Tree Experiment Station
- Cross year: 1990
- Released: 1992
- GI status: Approved variety under GI Yamanashi