Tancho Koi are an iconic koi variety known for their pure white bodies and a single red circle on the head. This unique pattern resembles the Japanese flag, making them especially prized in Japan for their cultural symbolism and beauty.
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Tancho Koi are an iconic koi variety known for their pure white bodies and a single red circle on the head. This unique pattern resembles the Japanese flag, making them especially prized in Japan for their cultural symbolism and beauty.
Solid white body with a single red spot (hi) on the center of the head. No other red markings should appear on the body. The spot should be symmetrical, well-defined, and deep red in color. Body should be sleek with unblemished white skin.
25–35 years with proper care; some can live over 40 years in optimal pond environments
Omnivorous – thrives on high-quality koi pellets, leafy greens (spinach, lettuce), fruits (oranges, melons), and occasional protein like shrimp, worms, or silkworm pupae.
Tancho Koi are a symbol of tradition, harmony, and elegance. Their simple yet powerful appearance makes them a favorite among collectors and pond keepers who value symbolism and beauty. With proper care, they remain breathtaking for decades.
Moderate – while hardy, they require pristine water to maintain the purity of their white skin and the intensity of the red marking.
500 gallons for juveniles, with 1000+ gallons recommended for adults
7.0 to 8.0
5–15 dGH
59–77°F (15–25°C), adapts seasonally with proper care
24–30 inches, depending on genetics and pond conditions
Best kept with other koi or peaceful pond fish like goldfish. Avoid fin-nippers and aggressive species.
Avoid aggressive or territorial species, especially those that nip fins or disturb calm koi.
Cyprinus carpio
Cyprinidae
Japan – selectively bred from Kohaku to emphasize head-only red marking
Highly social and peaceful. Thrive in groups and enjoy swimming with other koi varieties.
Feed 2–3 times daily during warm weather. Slow down feeding in colder months, and stop below 50°F (10°C). Include pellets, leafy greens, fruits, and occasional protein for optimal coloration.
Egg scatterers – spawn in warm water (68–75°F). Eggs adhere to submerged plants or spawning media. Adults should be removed after spawning to avoid egg consumption.
Provide clean, shallow spawning ponds with brushes or aquatic vegetation. Maintain water temperature between 68–75°F. Eggs hatch in 3–7 days. Separate parents immediately after spawning. Fry should start with infusoria and move to baby brine shrimp.
pH: 7.0–8.0, Temperature: 59–77°F (15–25°C), Hardness: 5–15 dGH, Ammonia/Nitrite: 0 ppm, Nitrate: <40 ppm. High oxygenation is critical.
Susceptible to common koi ailments like ich, bacterial ulcers, flukes, and fungal infections. Red spot can fade with poor water quality or stress, so monitoring is essential.
Gentle, social, and graceful. Tancho Koi interact peacefully with other koi and often become focal points in the pond.
Peaceful, curious, and calm swimmers. Tancho Koi are sociable with other koi and often admired for their graceful appearance and tranquil presence.
Tancho Koi are one of the most recognized and cherished koi types, especially in Japan, due to their resemblance to the national flag. The term 'Tancho' refers to a koi with a single, perfectly placed red mark (hi) on its head. The most sought-after variety is the Tancho Kohaku, featuring a snow-white body and a deep crimson circular spot on the head. Variants also include Tancho Showa and Tancho Sanke, which may have additional black markings on the body. Because their beauty depends on the precision and clarity of the red spot, these koi are judged with a critical eye in competitions. They require clean, stable water conditions to maintain their white brilliance and red vibrancy.