Sekiguchi

Sekiguchi Koi Farm

Situated in the koi heartland of Niigata Prefecture, Japan, Sekiguchi Koi Farm is world-renowned for its work with Showa Sanshoku, one of the most iconic varieties of Nishikigoi. Established and run by the Sekiguchi family, the farm has earned a place among Japan’s elite breeders thanks to its ability to consistently produce Showa that combine powerful presence, refined beauty, and excellent growth potential.

While many breeders produce Gosanke (Kohaku, Sanke, Showa), Sekiguchi Koi Farm has become synonymous with Showa. Over decades of careful refinement, the Sekiguchi bloodline has established itself as one of the most consistent and recognisable in the industry.

Sekiguchi Showa are admired for:

• Intense, lacquer-black sumi that surfaces with boldness and balance.
• Rich, even beni (red) that retains depth and vibrancy as the koi matures.
• Bright shiroji (white skin) that enhances the contrast of the pattern.
• Impressive body conformation, with strong frames capable of reaching jumbo size while keeping elegance of movement.
• Steady, predictable development, with koi often becoming more beautiful each passing year — a hallmark of a great bloodline.

For these reasons, collectors across the globe often place Sekiguchi Showa at the very top of their wish lists.

The farm operates across a network of traditional mud ponds in Niigata’s mountainous environment, where koi grow throughout the summer months in natural water rich in minerals. This setting allows koi to achieve robust health, excellent skin quality, and steady growth.

In winter, koi are transferred to carefully managed indoor facilities where they are fed, monitored, and selectively refined. This dual system of natural outdoor growth and controlled indoor care ensures that only the best koi advance through each stage of selection, maintaining the high standard Sekiguchi is known for.

Sekiguchi Koi Farm exports its koi worldwide, with Showa bloodlines highly sought after by both serious hobbyists and dealers. The farm’s koi frequently stand out at shows thanks to their bold sumi patterns and well-balanced colouration, qualities that are instantly recognisable to judges and collectors alike.

What sets Sekiguchi apart is its ability to balance tradition with innovation. While rooted firmly in Niigata’s koi-breeding heritage, the farm has continually refined its techniques and bloodlines to meet the demands of modern collectors. Each koi reflects not only Japanese craftsmanship but also the personal care and passion of the Sekiguchi family.