Japanese Koi Fish Sizes and Basic Varieties
Japanese Koi Fish have many varieties here are the 17 varieties accepted by the 20th All Japan Nishiki-Goi Show held in Tokyo in 1988. British and American dealers usually classify 13 varieties. At most show there are arguments about the categorization of some Koi.
Japanese Koi Fish 8 Size System
- Up to 18cm (7”).
- Up to 20 cm (8”).
- Up to 25 cm (10”).
- Up to 30 cm (12”).
- Up to 35 cm (14”).
- Up to 40 cm (16”).
- Up to 45 cm (18”).
- Up to 50 cm (20”).
- Up to 55 cm (22”).
- Up to 60 cm (24”).
- Up to 65 cm (26”).
- Up to 70 cm (28”).
- Up to 75 cm (30”).
15 Size System
- Up to 15cm (6”).
- Up to 80 cm (32”)
- Over 80 cm (32”)
- Up to 25 cm (9 ¾”)
- Up to 35 cm (13 ¾”)
- Up to 45 cm (17 ¾”)
- Up to 55 cm (27 ½)
- Up to 65 cm (25 ½”)
- Up to 75 cm (29 ½”)
- Over 75 cm (29 ½”)
Commercial Varieties
- Kohaku
- Taisho Sanke
- Showa Sanshoku,
sometimes referred
to as Showa Sanke
- Utsuri Mono
- Bekko
- Asagi-Shusui
- Koromo
- Kawarimono
- Ogon
- Hikarimoyo-Mono
- Hikari Utsuri
- Kinginrin
- Tancho

Competition Categories
- Kohaku
- Taisho Sanki
- Showa Sanshoku
- Utsuri Mono
- Hikari Muji
- Hikari Moyo
- Asagi
- Shusui
- Goshiki
- Kawarimono
- A-Ginrin (including
Kohaku, Taisho
Sanke, Showa
Sanshoku)
- B-Ginrin (excluding
Kohaku, Taisho
Sanke, Showa
Sanshoku)
- Bekko
- Hikari Utsuri
- Tancho
- Koromo
- Doitsu-Goi
(excluding Shusui,
Hikari)

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