The Foundations of Nishikigoi: Kohaku, Sanke & Showa
In the world of koi keeping, three varieties stand above all others in prestige and popularity: the Kohaku, Taisho Sanke, and Showa Sanshoku. Together, they are known as the Go-Sanke (the Big Three), and they form the backbone of competitive koi showing worldwide. Understanding these varieties is essential knowledge for any koi enthusiast.
Kohaku: Elegance in Two Colours
The Kohaku is often described as the starting point of koi appreciation. It features a pure, snow-white base (shiro) adorned with red or orange-red patterns called hi. Despite being the simplest in terms of colour count, the Kohaku is arguably the hardest to perfect.
- Base colour: Crisp, bright white — no yellowing
- Pattern colour: Deep, uniform red (hi) with clean, well-defined edges
- Key quality markers: Pattern balance, hi consistency, skin quality
- Common patterns: Nidan (two-step), Sandan (three-step), Yondan (four-step), Inazuma (lightning bolt)
When judging a Kohaku, experienced keepers look for kiwa — the sharpness of the boundary between red and white. A blurry kiwa is considered a fault. The white skin should have a lustre often compared to porcelain.
Taisho Sanke: A Study in Three Colours
The Taisho Sanke — commonly shortened to Sanke — builds on the Kohaku pattern by adding black markings called sumi. This variety originated during the Taisho era (1912–1926), which gives it its name.
- Base colour: White
- Secondary colour: Red (hi) — similar placement to a Kohaku
- Tertiary colour: Black (sumi) — typically appearing as small, solid patches overlaying or alongside the hi
- Key distinction: No sumi (black) should appear on the head
A well-balanced Sanke has sumi that acts as an accent to the red and white, not dominating the pattern. The sumi tends to develop and deepen as the fish matures, making young Sanke exciting to grow on.
Showa Sanshoku: Bold, Dramatic, Dynamic
The Showa Sanshoku — or simply Showa — is the most dramatic of the three. Like the Sanke, it is a tri-coloured koi, but the fundamental difference is the base colour: Showa is built on a black base, not white.
- Base colour: Black (sumi)
- Secondary colour: Red/orange (hi)
- Tertiary colour: White
- Key distinction: Sumi appears on the head; wrapping black patterns on the body
Quick Comparison Table
| Feature | Kohaku | Sanke | Showa |
|---|---|---|---|
| Number of colours | 2 | 3 | 3 |
| Base colour | White | White | Black |
| Black on head? | No | No | Yes |
| Sumi style | None | Small spots | Wrap-around blocks |
| Origin era | Meiji | Taisho | Showa |
How to Tell Them Apart at a Glance
- Does it have black at all? If no — it's a Kohaku.
- Is there black on the head? If yes — it's a Showa.
- Is the body pattern mostly white with small black accents? If yes — it's a Sanke.
Which Variety Is Right for You?
For beginners, a Kohaku is often recommended — its simplicity makes it easy to appreciate and evaluate. Those drawn to complexity and bold visual impact tend to gravitate toward the Showa. The Sanke sits elegantly in between, offering refinement without the dramatic contrast of a Showa.
Whichever you choose, all three varieties reward careful observation as they grow and change — one of the great joys of koi keeping.