*Ends November 30th 2025. T&Cs apply.
Located in the serene Yamakoshi area of Nagaoka, Niigata Prefecture, Marujyu Koi Farm brings over six decades of koi-breeding tradition across three generations. Today, the farm is led by Shigeyoshi Tanaka and his two brothers, proudly carrying forward the passion and expertise passed down from their grandfather Shigekichi.
Marujyu has built a unique reputation for its refined selection and artistry, specializing in:
Beyond these, Marujyu maintains a rich portfolio of other varieties, allowing hobbyists to explore both classic and shimmering koi artistry.
Spanning an impressive 60,000 m² of raising area, Marujyu Koi Farm strikes a balance between tradition and modernity—honoring its legacy while meeting the standards of discerning koi enthusiasts worldwide.
Recent visits to the farm highlight strides in both infrastructure and quality. A touring breeder praised their new facility layout, especially noting the exceptional Go‑Sanke quality, and highlighted a unique collaboration with Dainichi breeding a special line of Showa called ‘Pandora.’
Marujyu’s koi reflect a thoughtful approach—each fish embodies elegance and precision. The farm’s commitment to variety, clarity, and breeding integrity ensures their koi consistently reach the standard expected by collectors and judges alike.
Marujyu Koi Farm, led by Shigeyoshi Tanaka and his brothers, represents a harmonious blend of legacy and innovation. From treasured Tancho and shimmering Ginrin varieties to refined Go-Sanke and Goromo, each koi reflects generations of expertise. Their expansive and modern facilities support their dedication to breeding koi of exceptional quality—making Marujyu a resonant name in Japanese koi culture.
