Omosako Koi Farm is located in Kure City, Hiroshima, Japan, and is internationally recognized as the premier breeder of Shiro Utsuri koi. Founded in 1960 by Ryuzo Omosako, the farm began as a Nishikigoi seller before evolving into a specialized breeding operation dedicated to refining black-and-white koi to the highest possible standard.
Today, the farm is operated by Ryuzo Omosako’s sons, Takayoshi and Takahiro, who have continued to elevate the farm’s reputation through innovation, precision breeding, and relentless focus on quality. Under their leadership, Omosako Koi Farm has become synonymous with excellence in Shiro Utsuri development.
THE GLOBAL STANDARD FOR SHIRO UTSURI
Omosako Koi Farm achieved historic recognition by winning the Grand Prize at the All Japan Comprehensive Nishikigoi Fair for twelve consecutive years, an unprecedented accomplishment that solidified its status as the world’s leading Shiro Utsuri breeder. These wins reflect the farm’s mastery of sumi development, skin clarity, and pattern balance.
Omosako’s Shiro Utsuri are defined by deep, lacquer-black sumi set against pure, snow-white skin. The contrast is sharp, stable, and visually powerful, qualities that continue to improve as the koi matures. One of the farm’s most celebrated koi, Musashi, reached an impressive 92 centimeters and earned the 85 Bu Kokugyo Prize at the 36th All Japan Koi Show, further cementing Omosako’s dominance in the variety.
BREEDING FOR LONG-TERM SUMI DEVELOPMENT
What distinguishes Omosako Koi Farm is its disciplined breeding approach focused on long-term development rather than early visual impact. The farm genetically refines its Shiro Utsuri lines to ensure that sumi emerges cleanly, thickens with age, and maintains its glossy finish over time.
This dedication to refinement has positioned Shiro Utsuri as a variety capable of rivaling Gosanke in both prestige and competition performance. The farm’s methods emphasize structure, skin quality, and pattern flow, creating koi that continue to evolve and gain presence year after year.
A BROAD RANGE OF COMPLEMENTARY VARIETIES
While Shiro Utsuri remains the farm’s flagship variety, Omosako Koi Farm also produces other stunning koi, including Showa, Ginrin Shiro Utsuri, Ginrin Showa, Kujaku. These varieties benefit from the same rigorous standards applied to the farm’s Shiro Utsuri program, resulting in koi with strong bodies, clean skin, and refined coloration.
The farm operates nearly 40 mud ponds and multiple indoor facilities across a large, carefully managed property. This scale allows Omosako to produce more than 40,000 Shiro Utsuri annually while maintaining exceptional quality control at every stage of development.
SHOP OMOSAKO SHIRO UTSURI – AWARD-WINNING KOI FROM JAPAN’S TOP BREEDER
Omosako Koi Farm works directly with Fitz’s Fish Ponds to custom select koi that represent the innovation, quality, and excellence the farm is known for. Each koi is chosen for its contrast, structure, and long-term development potential, ensuring it reflects the standards that have defined Omosako’s global reputation.
Whether you are an experienced collector or just beginning your koi journey, Omosako koi offer a benchmark of modern elegance and refinement. Their striking black-and-white contrast and proven lineage make them a standout addition to any pond or collection.
Explore our selection of Omosako koi today and experience the craftsmanship behind the world’s most respected Shiro Utsuri breeder. Need help choosing the right koi? Talk to a koi expert online or call us at (908) 514-4778.
