The Kohaku Koi is one of the most iconic and popular koi varieties, recognized for its pure white body adorned with bold red (hi) patterns. It is often the first variety kept by koi enthusiasts and is a symbol of elegance and tradition in Japanese culture.
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The Kohaku Koi is one of the most iconic and popular koi varieties, recognized for its pure white body adorned with bold red (hi) patterns. It is often the first variety kept by koi enthusiasts and is a symbol of elegance and tradition in Japanese culture.
White body (shiroji) with red markings (hi) across the head and body. The white should be snow-like, clean, and free of blemishes, while the red should be deep, uniform, and sharply defined. Common pattern styles include two-step (nidan), three-step (sandan), and inazuma (lightning-bolt).
25–35 years on average; with excellent care, can live 40+ years
Omnivorous; thrives on high-quality koi pellets, fresh vegetables (lettuce, peas, spinach), fruits (orange slices, watermelon), and protein-rich foods such as shrimp, worms, and bloodworms. Seasonal feeding adjustments recommended (wheat germ in cooler months).
Kohaku Koi are the most classic koi variety and form the foundation of koi appreciation worldwide. With their serene beauty and cultural symbolism, they remain the top choice for both beginners and serious collectors.
Intermediate – requires large pond, excellent water quality, and consistent maintenance.
500+ gallons pond (1000+ gallons recommended for a small group)
7.0 to 8.0
5–15 dGH
59–77°F (15–25°C); can tolerate wider range with proper acclimation
24–36 inches (60–90 cm) depending on genetics and environment
Other koi varieties, pond-safe fish such as goldfish, orfe, and some loaches. Avoid predatory or territorial species.
Predatory or overly aggressive fish, large cichlids, and species that may nip at koi fins. Avoid mixing with goldfish varieties prone to injury in large ponds.
Cyprinus carpio (Kohaku variety)
Cyprinidae
Japan; developed through selective breeding, originally from common carp (Cyprinus carpio).
Schooling pond fish; thrive in groups of koi. Social and interactive, often hand-tame with regular feeding.
Feed 1–2 times daily in warm weather with koi-specific pellets and supplements. Reduce feeding frequency as water temperature drops below 50°F (10°C). Provide high-protein diet during growth seasons and wheat germ-based foods during cooler months.
Egg-scatterers; spawn during spring when water temperatures rise. Females release thousands of eggs on aquatic plants or spawning mops, fertilized by males. Adults may eat eggs and fry, so breeding is best controlled in a separate setup. Fry require live foods such as infusoria, then gradually transition to brine shrimp and micro pellets.
pH: 7.0–8.0, Temperature: 59–77°F (15–25°C), Hardness: 5–15 dGH, Ammonia/Nitrite: 0 ppm, Nitrate: <40 ppm. Large ponds with excellent filtration and aeration required.
Susceptible to koi herpesvirus (KHV), parasites (flukes, anchor worms), and bacterial infections if water quality is poor. Quarantine new koi and maintain optimal pond hygiene to prevent disease outbreaks.
Peaceful, social, and intelligent. Kohaku Koi thrive in groups and often interact with their keepers. They are gentle and get along well with other koi and pond-safe fish. They are active swimmers, especially during feeding time, and quickly recognize their caregivers.
The Kohaku Koi is regarded as the foundation variety of koi keeping. Its striking white skin (shiroji) serves as the perfect canvas for red patterns (hi), which can appear in various styles and forms. Kohaku is one of the three koi varieties considered part of the 'Big Three' (Gosanke) alongside Sanke and Showa. They are prized in Japanese culture for representing purity, success, and prosperity. Selective breeding emphasizes qualities such as crisp color separation, balanced patterning, and clean skin. Kohaku Koi are hardy, adaptable, and thrive in outdoor ponds with excellent filtration and aeration. Their vibrant appearance makes them a centerpiece in any pond.