Fermented & preserved
Kurozu
Kagoshima's outdoor jar-brewed amber-black rice vinegar
A rice vinegar brewed and aged for roughly a year inside earthenware jars set out in open fields, using rice, koji, and water. Fukuyama in Kirishima, Kagoshima is said to be its birthplace, where good water, good rice, and a climate suited to open-air jar brewing all came together.
- Origin: Kagoshima Kirishima
- About 940 km southwest of Tokyo
What it's made of
Its color deepens from amber to blackish-brown with age, and beneath a mellow acidity sits a distinctly toasty aroma. It carries more umami and richness than plain rice vinegar, enough that it holds up as a drink diluted with water or soda. Used in cooking, it adds toastiness along with sourness, which is why dishes like kurozu-based sauces lean on it to sharpen a dish's flavor.
How it's made
Steamed rice, rice koji, and water are set inside earthenware jars lined up outdoors, and a single jar carries the process through saccharification, fermentation, and acetic fermentation in one vessel. The liquid visibly darkens from amber toward blackish-brown over roughly a year of fermentation and aging. That slow process, exposed to sunlight and shifting temperatures inside the jar, is said to be what produces its particular toastiness and deep color.
Why it took this shape
Fukuyama in Kirishima, Kagoshima is said to be its birthplace. Good water and good rice aside, Fukuyama is said to have had the mild climate needed for open-air jar fermentation, along with enough shelter from wind and rain. The jar-brewing method itself is thought to be something that could only have taken hold under this particular climate.
Dishes in the same style
- Achara ZukeWhite melon, eggplant, and lotus root are pickled in a sweet vinegar spiked with red chili — the name is said to trace to the Portuguese 'achar', carried in through Hakata Bay's old trade, and an odd number of vegetables is used for Obon hospitality.
- AhodakiOld takuan pickle, once its flavor and aroma have faded, is desalted and simmered again in soy sauce, a pantry staple from the Hokusei area. Its name — playfully self-deprecating, roughly "doing a foolish thing" — nods to eating it well past its prime, a frugal way to waste nothing.
Ingredients and dishes from this land
Also from Kagoshima
- Abura ZomenPork and somen are fried together with a splash of broth, the oil and stock emulsifying into a silky coat on the noodles. Just how somen took root in wheat-free Amami isn't clear, but the dish is a fixture whenever people gather, not least for the August Dance festival.
- AkumakiMochi rice steeped in wood-ash lye is wrapped in bamboo sheath and boiled for hours in more lye water — a Boys' Festival sweet said to have fed Saigo Takamori's troops in the field. The lye's alkalinity holds bacteria back, letting it keep for days in Kagoshima's heat and humidity.
- Amami Kokuto-jochuKokuto-jochu permitted to be made only in the Amami Islands of Kagoshima Prefecture. It's said to carry a sweet aroma distinctive to islands where sugarcane cultivation thrives, and around 30 breweries are said to compete on character while observing the liquor tax law's condition that rice koji be used.
- Buta Hone YasaiBone-in pork cut into big chunks is simmered in a large pot with tsuwabuki, daikon, and koshaman taro — an Amami dish essential to New Year's Eve, also called wanfineyasse. It's regarded as a wisdom born of using every part of the island's own black pigs.
- Buta JiruPork simmered with daikon, taro, and other roots in a miso broth, built on Kagoshima's own pork — the prefecture raises more hogs than any other — paired with a barley miso high in koji and correspondingly sweet. A warming bowl for winter, common at home and in school lunches alike.
- Buta MisoBoiled pork is pounded together with miso and sugar into a keeping paste, with peanuts and bonito flakes added in Amami versions. It's said to have grown out of the need to use every part of the one pig a household slaughtered each year, alongside salting and other preserved forms.