Creating a New
Generation of
to surpass


  • 2010Best in Variety
  • 2011-2012Best in Variety
  • 2013Best in Variety
  • 2014Best in Variety
  • 2015Best in Variety
  • 2016Best in Variety
  • 2017Best in Variety
  • 2018Best in Variety
  • 2019Best in Variety
  • 2020Best in Variety
  • 2022Best in Variety
  • 2023Best in Variety

OMOSAKO KOI FARM was founded in Kure City, Hiroshima Pref., to sell Nishikigoi in 1960.

Enchanted by Nishikigoi, Ryuzo Omosako, the founder, made strides to promote Nishikogoi sales here.
Driving a truck for hours with a water tank, he brought back Nishikigoi from Ojiya City, Niigata Pref., the place of origin of Nishikigoi.

From the very beginning, each Nishikigoi has enchanted people by its one and only pattern. No Nishikigoi has the same pattern as others.

Among many Nishikigoi breeds, ‘Shiro-Utsuri’, with its patterns consisting of black and white, is a key breed to us.

At present, our koi farm is located at Tochihara Cho, Kure City, specializing in producing ‘Shiro-Utsuri’, shifting our business more to production from distribution.

Awarded in ‘Shiro-Utsuri’ category for 12 consecutive years

Our ‘Shiro-Utsuri’ has come to win more prizes at different fairs recently.
Among others, at annual ‘All Japan Comprehensive Nishikigoi Fair’, the most authoritative contest in the world, we have won the ‘Grand Prize’ for 12 consecutive years in the category of ‘Shiro-Utsuri’.
We would like to thank all the people concerned with Nishikigoi and the fans in particular for appreciating our years long endeavour.

Nishikigoi grows day by day

Breeding technology and its equipment are also making progress

We are resolved to make a progress step by step with a view to enchanting every visitor at the first sight of our Nishikigoi.

We would request you to continue to support us.

Our Facility

Koi grows up carefree in rich nature

What surrounds us

  • What We Look Like
  • Noike, wild pond
  • Chigyo, fry, pond
  • House pond

What We Do

What we do at our farm in a year。

May to July

  • Spawning, or laying eggs
  • Koi eggs

June to September

After hatching, koi are screened as they grow bigger.

Grown-up Nishikigoi are released into a big Noike to get even bigger.

October to November

‘Ikeage’ will take place at Noike to pick up large Nishikigoi.

November to April

Domestic and overseas buyers come for newly picked-up Nishikigoi.

With agreed negotiations, Nishikigoi are shipped.

Excellent Nishikigoi are exhibited at a fair to compete its beauty.

Our Company


Name of the company
Omosako Koi Farm Co., Ltd.
Omosako, Takashi
178 Tochihara Cho, Kure City, 737-0922
Breeds we are producing
Shiro-Utsuri, Showa-Sanshoku, Ginrin-Shiroutsuri, Ginrin-showa, Goshoku, Kujaku


1960 Omosako Koi Farm was established.
1973 Koi farm was built at Tochihara Cho.
1978 First encounter with the koi to come up with production of Shiro-Utsuri
1979 Startup to produce Shiro-Utsuri
1981 ‘Ganso’ parent koi from Sakai was introduced.
1985 Male parent koi from Niigata was introduced.
1989 Parent koi ‘Tokumitsu’ was introduced.
1992 Omosako Koi Farm Co., Ltd. was established.
1992 Parent koi ‘Tatsuma-Utsuri’ was introduced.

1st All Chugoku District Convention

Comprehensive Grand Champion was awarded to Shiro-Utsuri

Producer:Sakai Koi Farm