黒 kuro mean “black” and にんにく ninniku means “garlic.”
In Okinawa, it is possible to find black garlic. It is island garlic, raw, aged under heat and humidity for a period of time (no additives), turning the garlic softer and sweeter. It retains a fragrant garlic aroma, but does actually does not cause the strong garlic breath after eating. It is a really nice (and supposedly healthy) flavor to add to recipes.