Understanding koi classifications and recognising varieties can sometimes seem bewildering to all concerned with koi keeping especially new comers to the hobby.  However, if we look at it from the point of view of the standard benching classifications used for shows then the following hints, which were drawn up to help Benches, might shed some light on the subject.  For those of you unfamiliar with the word, benching merely refers to the process of classifying, sizing and recording koi at shows to enable them to be judged.

From the judging requests received this year, it has become apparent that general guidelines regarding benching would be appreciated by most show committees and the following hints have been drawn up in the hope that they will assist benching teams in their tasks.

At the outset it may help to distinguish between classifications and varieties.  If we regard a variety as a koi which can be reproduced regularly, as apposed to the one-off unique koi, and use the term classifications for the 13 basic benching divisions, it follows that some classifications contain several varieties e.g. Gin–Rin include Gin Rin Kohaku, Gin-Rin Sanke etc; Kawaramono includes Karasugoi, Kigoi, Aka Matsuba, Chagoi to name but a few.

It would also be helpful to recap on the 13 benching classifications which comprise of:-

Ten classes of non metallic koi:-

1. Kohaku
2. Sanke
3. Showa (including Kage Showa)
4. Utsurimono
5. Bekko
6. Koromono (including Goshiki)
7. Asagi/Shusui
8. Tancho (including Gin-Rin Tancho)
9. Gin – Rin
10. Kawarimono    - all other non metallic koi not already mentioned

And three classes of metallic koi:-

1. Hikari Utsuri – Metallic Showa and Utsuri
2. Hikari Muji – Orgon and Matsuba Orgon
3. Hikari Moyo – all other metallic koi not already mentioned.

2.Sanke and 3. Showa

The benching hints for these are taken together as the confusion between Sanke and Showa is probably the one that crops up most often to the new comer to the hobby, and with growing popularity of “modern” Sanke's and Showa's can present even the experienced Benchers with a few headaches.

The general guidelines are that Sanke is a white Koi a Hi (red) and sumi (black) on it, the sumi is in clusters located above the lateral line, it shouldn't have sumi on the head and can have striped sumi on the pectoral fins.

Whereas a Showa is a black koi with white and hi on it, the sumi in large areas above and below the lateral line, it has sumi on the head and motoguro on the pectoral fins. This still rings true to a certain extent, especially regarding traditional patterns, however it is when we throw in the modern Sanke and Showa both of which have small areas of sumi and large areas of white/hi that this area becomes blurred.

In these instances (and when the usual guidelines require confirmation) we need to look at the essence of the differences between the two varieties, and that is the type and shape of the sumi. The sumi of the Sanke appears in blobs, or spots on the skin of the Koi, where as that of the Showa appears to have risen from the base of the Koi in blocks or streaks.
The difference goes back to the general guidelines of Sanke being developed from a white koi (or Kohaku) and Showa from a black koi, although it is probable a fair amount of cross breeding now occurs to produce the modern varieties and we are therefore left to look for clues as to the original lineage.

When confronted with a variety dilemma of Sanke/Showa it is probably easier to look for the Showa clues initially and ask yourself:-

1. Does if have large blocks of sumi above/below the lateral line?
2. Does if have sumi/emerging sumi on the upper lip/nose?  This will always be a sign of Showa.
3. Does it have sumi on the head, which will be in streaks/blocks or a combination of both?
4. Does it have motoguro (thick sumi joints at the base of the pectoral fins)?

If none of the typical Showa giveaway are present then you probably have a Sanke and other clues should confirm this e.g. striped to the pectoral fins etc. 
It should be stated here that the general guide lines are exactly that, general and there can be variances e.g. it is possible for a Sanke to have sumi on the head but it will appear in blobs or spots, it is also possible for both Sanke and Showa to have clear pectoral fins and we should not confuse emerging Tategoi (for want of a better word) sumi on young Sanke for the more deeper based Showa sumi.
If you are still unclear of the variety, and they are both getting so close together it will be happening more often, it is certainly not a reflection on the benching teams abilities, all they have to do is take a note of the Koi in question and refer it to the senior judge before judging commences. 
Also worth mentioning is that here Showa classification now includes Kaga Showa, a logical step as it is usually a transient Koi which ends up a true Showa in any case.

6. Koromo

As Goshiki is now included in the koromo classification the usual grey area in this classification is removed. It was a sensible move in any case as a lot of Ai-Goromos develop into Goshiki.  It might also be worth repeating here that a Kohaku with shimmies is still a Kohaku, and Ai-Goromo must have underlying blue or black scale robing, be it ever so faint. 

10. Kawari-Mono

To repeat what was stated in the benching classifications earlier this class includes all other non metallic koi not included in 1 – 9 above.

From the benching point of view it can not be put any simpler than that.  Do not try to memories all the other non metallic varieties and unique koi as it is simply not possible.  New one off unique koi are bred regularly in garden ponds and breeding establishment around the world, in fact there are probably few garden ponds in the UK without their own one off unique koi.  It can, of course, be a fascinating aside to try and establish the linage and guess the parentage of a particular unique koi and is a relatively simple matter memorising the basic single colour and Matsuba varieties and their derivatives e.g. Kawasugoi, Chagoi, Kigoi, Aka Matsuba etc.  However from the benching and classification angle all we need to be sure of is that it is non – metallic and is not one of the varieties included in the other classes, in which case it must be included in Kawari Mono.  In other words learn 1 – 9 above and Kawari Mono takes care of itself.

13.Hikari Moyo

Again to repeat what was under benching classifications this class includes all other Metallic koi not mentioned in 11 -12 above.  In other words if you memorise the fifteen (approximate).  Varieties included in 11 – 12 then all other metallic koi are benched under Hikari Moyo.  As in Kawari Mono it is not possible to memorise all the unique metallic koi.  By all means learn to recognise the usual varieties that are included in this catch all groups e.g. Hariwake, Kujaku, Yamatoshinishki etc but the main thing to remember is that if it is metallic and not included in 11 – 12 above then its Hikari Moyo. 

Benching can be one of the most informative and enjoyable areas of our hobby and it is possible to gain more from one days benching than from weeks of reading articles and magazines, with the added attraction of meeting and of working with a great bunch of people.  So if you are one of the knowledgeable people who would like to become involved and help out with benching I am sure your local section show person would like to here from you.  

Hopefully you will find these hints useful, but like everything else koi keeping they are not written in stone, there will always be exceptions to the rule, you just need to be able to recognise them when they come along.  The one golden rule has already been mentioned; if you are not sure don’t be afraid to ask, by making a note of the koi and informing the senior judge about it before judging starts. 

Thanks to Walter Reed for his expert guidance

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