Maruhiro Koi Farm (丸広養鯉場 – Maruhiro Yōriba)

Maruhiro Koi Farm, located in Ojiya City, Niigata Prefecture, is a renowned breeder of Japanese Nishikigoi. Known for both exceptional quality and large-scale production, the farm has become one of the most respected names in the koi world, producing koi that range from affordable hobbyist fish to competition-winning specimens admired worldwide.

Maruhiro has grown steadily into one of Niigata’s most established koi farms. The name “Maruhiro” reflects both the family’s heritage and their philosophy of koi breeding:

• Consistency and quality across all varieties
• Blending tradition with modern koi husbandry
• Making beautiful koi accessible to hobbyists around the globe

While many breeders focus on one or two varieties, Maruhiro is celebrated for its diverse range, offering koi that cater to both beginners and advanced collectors.

Maruhiro Koi Farm produces a wide range of koi varieties, including:

• Kohaku, Showa, and Sanke (Gosanke) – refined examples of Japan’s most iconic koi
• Chagoi, Ochiba, and Soragoi – powerful body shapes with warm earthy tones
• Yamabuki Ogon, Platinum Ogon, and metallic varieties – bright, lustrous koi that stand out in any pond
• Doitsu varieties and Kawarimono – unique koi with striking individuality

This diversity has made Maruhiro a preferred source for koi dealers worldwide, as the farm can provide both high-quality tosai (young koi) and larger, finished specimens.

• Situated across the koi heartland of Ojiya, Niigata
• Extensive mud ponds used to raise koi naturally, developing body size and skin lustre
• Indoor facilities for tosai growth and overwintering
• A reputation for producing koi in large numbers while maintaining quality, making them an important supplier for the global koi industry

Maruhiro koi are exported across Europe, North America, and Asia, where they are prized for their quality and variety. The farm has built long-standing partnerships with koi dealers worldwide, ensuring that enthusiasts everywhere can enjoy koi bred in the mountains of Niigata.

While some Niigata farms focus solely on high-end show koi, Maruhiro is unique in its ability to cater to all levels of the market—from hobbyists purchasing their first koi to collectors seeking champion-quality fish.

From its beginnings in Ojiya to its role today as one of Niigata’s leading koi breeders, Maruhiro Koi Farm represents the harmony of tradition, scale, and craftsmanship. Whether you are seeking affordable, high-quality koi for your pond or exceptional show specimens, Maruhiro continues to deliver koi that embody the beauty and diversity of Japanese Nishikigoi.