Niigata Breeder: Isa

Since its founding in 1970 in Ojiya, Niigata—the birthplace of Nishikigoi—Isa Koi Farm has been synonymous with championship-quality koi. Now under the leadership of second-generation breeder Mr. Isa Mitsunori, the farm continues its legacy of:

🏆 Award-Winning Bloodlines – Renowned for producing the "Big Three" (Showa Sanke, Taisho Sanke, Kohaku), with "Isa Showa" celebrated globally for its exquisite sumi (black patterning).

❄️ Nature-Perfected Beauty – Combining traditional breeding techniques with relentless innovation, Isa’s koi thrive in Ojiya’s snowmelt ponds, emerging as true "swimming jewels."

🔬 Selective Excellence – Today, the farm focuses on Showa Sanke & Kohaku, prioritizing bold patterns, vibrant colors, and jumbo-size potential.

Every Isa koi reflects:
✓ Generational expertise (50+ years)
✓ Uncompromising quality control
✓ Harmony with Niigata’s natural environment

Why Choose Isa Koi?
→ Proven competition winners
→ Signature "Isa Showa" distinction
→ Ethically bred for health & longevity

Discover the artistry behind Japan’s most coveted koi—exclusive imports available at Genki Koi.













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