Hisashi Hirasawa

Marudo Koi Farm (officially Marudo Koi Farm) is a leading Japanese koi breeding operation situated in Ojiya City, Niigata Prefecture — the heart of Nishikigoi country. The farm was founded around 1970 by Hisashi Hirasawa, a former Dainichi Koi Farm breeder, and is now operated alongside his son Toshihiro Hirasawa, representing the third generation .

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Specialization

Marudo excels in breeding high-quality Gosanke varieties, particularly Kohaku, Sanke, and Showa. These koi are prized for their bold color, strong pattern, and robust body structure. The farm also produces Asagi/Shusui, Hikarimono, Karashigoi, Chagoi, and Yamabuki Ogon, with special attention paid to jumbo-sized specimens and Tancho forms .

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Farm Overview

• Founded: Circa 1970 by Hisashi Hirasawa

• Location: Ojiya City, near Yamakoshi, Niigata Prefecture, Japan

• Current Owners: Hisashi Hirasawa and son Toshihiro Hirasawa (third generation)

• Facilities: Approximately 100,000 m² (25 hectares) of breeding and raising ponds, used to culture large-format koi and jumbo tosai

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Reputation

Marudo Koi Farm is widely regarded as one of Niigata's top-tier breeders. Drawing on knowledge from Dainichi Koi Farm, Hisashi has shaped Marudo into a major influence in gosanke genetics. Collectors and dealers particularly value the firm color, pattern clarity, and body shape of Marudo Kohaku and Sanke. Their jumbo tosai and nisai performances are frequently noted for striking size and potential .

 

In Summary

Marudo Koi Farm specializes in premium Kohaku, Sanke, and Showa, alongside Asagi/Shusui and Hikarimonovarieties. With a legacy built on selective breeding and experience from Dainichi Koi Farm, Marudo consistently produces koi with powerful appearance and growth potential. Their focus on quality over quantity and large-format tosai makes them a standout in Niigata’s koi breeding tradition.