Nishikigoi are ornamental koi carp that originated in the early 19th century in the snowbound mountain district of Ojiya and Yamakoshi, Niigata Prefecture, Japan — bred by rice farmers who first kept plain black carp as a winter food source, then selectively bred the rare color mutations that appeared among them. Ojiya is still recognized today as the birthplace of Nishikigoi, and the region's textile craft, Ojiya Chijimi, was shaped by that same snow country climate.
Here's the fuller story of how Nishikigoi came to be, how a handful of color mutations became a global obsession, and why tsuggu pairs the koi motif with Ojiya's own ramie cloth.
Terraced rice paddies and irrigation ponds in the Yamakoshi district of Nagaoka, Niigata — the kind of small mountain pond where koi breeding began. Photo: Koichi Hayakawa.
Bred for food, not for looks
The story starts sometime between 1804 and 1830, in a cluster of mountain hamlets known as Nijumura, straddling what's now Ojiya City and the Yamakoshi district of Nagaoka. This is serious snow country — winters here could bury the villages under four meters of snow, cutting them off from the outside world for months at a stretch. There was no fresh fish market to rely on, no way in or out until spring.
To survive, farmers raised black carp (magoi) in small ponds — the same ponds used to irrigate rice terraces in summer — as a dependable source of protein through the winter. These carp weren't kept to be admired. They were livestock, plain and gray, raised to be eaten.
An accident that became a tradition
At some point, farmers noticed something unusual: a few carp were hatching with faint reddish or orange patches instead of the usual uniform black. Rather than eat these "color carp" (irogoi), people began setting them aside, keeping them separately, and breeding them on purpose.
This wasn't a quick discovery followed by instant success. It took generations of patient, largely undocumented work — farmers with no formal training in genetics, selecting fish by eye, year after year, gradually coaxing clearer patterns and steadier colors out of what had started as a random mutation. By the late Edo period, the basic forms of Nishikigoi had taken recognizable shape. By the early Meiji era, carp with distinct, deliberate patterns — known as moyogoi — were being actively bred and traded among enthusiasts in the region.
From one mutation to a hundred varieties
What began as a single color anomaly eventually branched into an entire system of named varieties, each defined by specific colors, patterns, and placement. A few of the best-known:
Kohaku — white body with red (hi) markings, considered the foundational variety and still the most popular today. A Kohaku with a single red spot centered on the head is called Tancho, prized for its resemblance to the Japanese flag.
Showa (Showa Sanshoku) — black body base with red and white markings layered on top, developed in the early Showa era (1926–1989) and named for it.
Taisho Sanke — white body with red and black markings, developed slightly later than Kohaku, during the Taisho era.
Well over a hundred named varieties exist today, each the product of the same basic method that started in those mountain ponds two centuries ago: watch closely, select carefully, breed patiently.
A Tancho Kohaku — white-bodied with a single red marking on the head, one of the most recognized Nishikigoi patterns today.
A Showa, showing the variety's characteristic black base with red and white markings layered over it. Photo: Robsig12.
From a mountain village to the world
For most of the 19th century, Nishikigoi were a local secret, virtually unknown outside the snow country of Niigata — there was, after all, no easy way to transport live fish out of a village buried in snow for half the year. That changed in 1914, when roughly twenty koi from the region — still called kawarigoi, "unusual carp," at the time — were shown at the Tokyo Taisho Exposition in Ueno Park. They won a silver medal and, more importantly, national attention. By 1925, Niigata's koi were being exported to the United States.
The name "Nishikigoi" itself only became the common term after 1945. Today the fish is recognized worldwide, often simply as "koi," and serious specimens command extraordinary prices at auction — six and seven figures in dollars for a single fish with exceptional color and pattern isn't unheard of among collectors. But the fish itself hasn't moved far from where it started. Ojiya and Yamakoshi are still considered the authoritative source, and breeders and collectors travel there from around the world to buy directly from the farms that trace their lineage back generations.
Why the koi became a symbol of resilience
Part of what has made koi so enduringly appealing goes beyond their color. In East Asian folklore, carp swimming upstream against strong currents — and, in legend, leaping up a waterfall to become a dragon — became a symbol of perseverance and quiet strength. That symbolism traveled to Japan long before Nishikigoi existed, and it's part of why carp-shaped koinobori streamers are flown for Children's Day each May, one for each child in a household, regardless of whether the family keeps real koi at all.
Nishikigoi inherited that symbolism and added something to it: the idea that beauty can emerge slowly, through patience, from something plain. A fish bred for the dinner table became, through generations of careful attention, something people now travel across the world to see.
A pond full of Nishikigoi, showing the range of colors and patterns bred from a single 19th-century mutation. Photo: Bernard Spragg, public domain.
Ojiya today: still the center of the koi world
Ojiya hasn't stepped back from this history — it's built the city's identity around it. Ojiya Nishikigoi no Sato, a dedicated museum near the city center, documents the fish's history and displays live specimens. Even Ojiya's city hall keeps its own koi pond, marked with a stone monument, a small but pointed reminder of what the region is known for. Every autumn, Niigata hosts some of the most closely watched koi auctions and shows in the world, drawing collectors from Europe, the United States, and across Asia.
A koi pond at Ojiya City Hall, with a stone monument marking the site. Photo: Tyutyanya.
Ojiya Nishikigoi no Sato, a museum in Ojiya City dedicated to the history and breeding of Nishikigoi. Photo: Asturio Cantabrio.
The same snow, a different craft
Ojiya is also where tsuggu sources Ojiya Chijimi, the crinkled ramie textile woven and dyed in this same district for well over a thousand years — recognized in 2009 as part of UNESCO's Intangible Cultural Heritage of Humanity. That overlap with Nishikigoi's origin isn't a coincidence worth glossing over. It's the same landscape shaping two different crafts.
The heavy snowfall that once isolated these mountain villages and pushed farmers to raise carp for food is the same snowmelt that feeds Ojiya's rivers, used in the weaving and dyeing of the ramie fiber. And in a technique unique to the region, finished chijimi cloth is traditionally laid out directly on snowfields in late winter — a process called yuki-zarashi, or snow bleaching. As sunlight hits the snow, it releases a small amount of ozone that bleaches and purifies the fabric naturally, without chemicals. The cloth's signature texture, called shibo, comes from tightly hand-twisted threads that shrink unevenly when washed, leaving a fine, crinkled surface that catches light differently than any flat, machine-woven fabric.
Snow country shaped both crafts independently, a few kilometers apart — one a fish bred in mountain ponds, the other a cloth bleached on mountain snow.
Ojiya Chijimi ramie fabric, showing the fine, crinkled "shibo" texture characteristic of the weave. Photo: Yasuo Kida.
Where the two crafts meet: tsuggu's Nishiki-koi collection
That overlap is why tsuggu pairs the Nishiki-koi motif with Ojiya Chijimi cloth: not as a design mashup, but as two traditions from the same soil, brought together on one piece of fabric. Every piece is made from 100% Ojiya Chijimi ramie, hand-dyed by artisans in Ojiya on a snow-bleached white ground called yuki-shiro, using the same shibo technique described above. Because each piece is hand-dyed, the koi pattern varies slightly from one to the next — no two are exactly alike.
Nishiki-koi Ojiya Chijimi Tapestry — a hanging scroll featuring a single hand-dyed koi, ready to display with a wooden rod and cord included. W39 × H99cm. View the tapestry →
Nishiki-koi Ojiya Chijimi Noren Curtain — a larger doorway curtain in the same hand-dyed koi design, made to let air move through the room while the shibo texture catches the light. W84 × H120cm. View the noren curtain →
Both pieces are made to order in Ojiya, Niigata, by IONO — the same workshop tradition, and the same snow, behind everything in this story.
Frequently asked questions
What does "Nishikigoi" mean?
Nishikigoi (錦鯉) literally means "brocaded carp" — nishiki refers to a type of richly patterned silk brocade. The name describes the fish's colorful, patterned skin, which early breeders thought resembled woven brocade fabric. The term only became the common name for the fish after 1945; before that, they were called kawarigoi ("unusual carp") or moyogoi ("patterned carp").
Why is Ojiya considered the birthplace of Nishikigoi?
Ojiya and the neighboring Yamakoshi district of Nagaoka are where the first color-mutated carp were discovered and deliberately bred, sometime between 1804 and 1830. Rice farmers in this snowbound mountain region kept black carp in small ponds as a winter food source; when a few hatched with reddish coloring instead of plain black, farmers began breeding those color mutations on purpose rather than eating them. That original breeding stock, and the ponds it came from, are still in Ojiya and Yamakoshi today.
What are the main varieties of Nishikigoi?
There are over 100 recognized varieties, but the most foundational is Kohaku (white with red markings), followed by Taisho Sanke (white with red and black) and Showa (black base with red and white). A Kohaku with a single round red spot on the head is called Tancho, one of the most prized and recognizable patterns.
What is the connection between Nishikigoi and Ojiya Chijimi textiles?
Both originate from the same small area of snow-country Niigata. Ojiya Chijimi is a crinkled ramie fabric, woven and dyed using the region's abundant snowmelt water and traditionally bleached on the snow itself in a process called yuki-zarashi. Nishikigoi were bred in ponds fed by that same snowmelt a few kilometers away. Neither craft borrowed from the other — they developed independently, shaped by the same climate and geography, which is why tsuggu pairs the Nishiki-koi motif with Ojiya Chijimi cloth in its tapestry and noren collection.
Sources:
Ojiya City — "The Birthplace of Nishikigoi"
All Japan Nishikigoi Promotion Association — "The Birth and History of Nishikigoi"
Yamakoshi Official Website — "Nishikigoi"
Image credits:
Yamakoshi rice terraces and ponds: © Koichi Hayakawa, Wikimedia Commons, CC BY 4.0
Tancho Kohaku koi: Immanuel Giel, Wikimedia Commons, CC0 / public domain
Showa koi: © Robsig12, Wikimedia Commons, CC BY-SA 3.0
Swirl of koi: Bernard Spragg. NZ, Wikimedia Commons, public domain
Koi pond at Ojiya City Hall: © Tyutyanya, Wikimedia Commons, CC BY-SA 4.0
Ojiya Nishikigoi no Sato: © Asturio Cantabrio, Wikimedia Commons, CC BY-SA 4.0
Ojiya Chijimi ramie fabric: © Yasuo Kida, Wikimedia Commons, CC BY 2.0