Marusho Koi Farm is located in the Mushigame area of Yamakoshi, Niigata, one of the most historic and respected regions in the world of Nishikigoi breeding. Operated by Shosaku Igarashi, the farm has built a strong reputation for producing refined, show-grade koi with powerful presence and exceptional skin quality. With more than three decades of hands-on breeding experience, Mr. Igarashi has developed Marusho into a trusted name among collectors seeking traditional strength combined with competition-level refinement.
Yamakoshi’s mountainous terrain and natural mud ponds provide ideal growing conditions, helping Marusho koi develop strong bodies and deep coloration. The farm remains intentionally focused and disciplined, prioritizing quality and development over mass production.
EXCEPTIONAL SHIRO UTSURI WITH SHOW-LEVEL SUMI
Marusho Koi Farm is particularly celebrated for its Shiro Utsuri, which are widely regarded as some of the finest in Niigata. These koi are known for their crisp white skin paired with thick, lacquer-black sumi that emerges cleanly and holds its intensity as the fish matures.
Marusho Shiro Utsuri has earned top honors at the All Japan Nishikigoi Show, frequently competing against and even surpassing traditional Gosanke in major categories. This success reflects the farm’s precise breeding approach and long-term focus on stable sumi development, body structure, and balanced pattern placement.
STRONG GOSANKE AND DISTINCTIVE VARIETIES
While Shiro Utsuri remains a defining specialty, Marusho also produces Sanke and Kohaku that reflect traditional Niigata aesthetics. These Gosanke are bred for clean skin, balanced red patterns, and reliable body growth, making them appealing to collectors who value classic structure and understated elegance.
In addition to Gosanke, the farm breeds Ai Goromo and Kujaku, offering varieties that add contrast and uniqueness to a pond. Ai Goromo from Marusho often display refined reticulation layered over rich red plates, while Kujaku showcase metallic brilliance paired with structured patterning.
A BREEDING PHILOSOPHY ROOTED IN EXPERIENCE
Shosaku Igarashi’s decades of experience guide every stage of Marusho’s breeding program. The farm focuses on carefully selected parent koi, disciplined culling, and raising koi in mud ponds that support natural development and strong body formation.
Marusho is also affiliated with the Nishikigoi Niigata Direct group, collaborating with other respected breeders in the region. This connection reinforces the farm’s commitment to maintaining high standards while contributing to Niigata’s broader koi community.
SHOP MARUSHO SHOWA AND SANKE – CLASSIC KOI WITH MODERN VISUAL IMPACT
Fitz’s Fish Ponds works directly with Marusho Koi Farm to select koi that embody the farm’s craftsmanship and competitive strength. Each koi is chosen for pattern balance, body conformation, and long-term development potential, ensuring it reflects the qualities that define Marusho breeding.
Whether you are searching for a show-ready Shiro Utsuri or a refined Gosanke with proven lineage, Marusho koi offer a blend of power, elegance, and tradition. Their ability to compete at the highest levels while maintaining lasting beauty makes them a standout addition to any collection.
Browse our selection of Marusho koi today and experience the depth and precision of one of Yamakoshi’s most respected breeders. Need help choosing? Our team is available online or by phone at (908) 420-9908 to guide you through your options and find a koi that fits your goals.
