Major Koi Varieties: Complete Profiles and Visual Characteristics
Gosanke: The Founding Three
Kohaku: Red and White Foundation
Visual Definition: Pure white body with deep red patterns, no black markings.
Key Quality Indicators:
- Shiroji (white): Lustrous, translucent, youthful appearance with no yellowing
- Hi (red): Even saturation, deep color extending to fin bases, no dull spots
- Kiwa (trailing edge): Sharp pattern delineation between red and white
- Sashi (forward edge): Minimal blur, ideally under two-scale width
- Body: Torpedo-shaped with wide shoulders, high form at shoulder, substantial tail joint
Appreciation: The foundation variety from which all others descended. Mastering Kohaku standards trains the eye for other varieties.
Sanke (Taisho Sanshoku): Three-Color Refinement
Visual Definition: White body base with red patterns and small black accents (NO black on head).
Sanke vs. Showa Distinction:
| Feature | Sanke | Showa |
|---|---|---|
| Body base | White (primary) | Black (primary) |
| Black on head | NEVER | ALWAYS |
| Sumi pattern | Spots, small accents | Bands, stripes, larger areas |
| Overall impression | Refined, balanced | Bold, dramatic |
Quality Standards:
- Shiroji quality matches Kohaku standards (white pristine, no yellowing)
- Hi saturation and artistic placement
- Sumi restraint—small, well-placed black accents enhance rather than dominate
- Pattern balance without front, tail, or side heaviness
Showa Sanshoku: Black-Based Drama
Visual Definition: Black dominates body with red and white patterns, black on head required.
Key Quality Indicators:
- Sumi intensity: Uniform black with no graying or fading
- Hi saturation: Deep red on black base
- Shiro areas: White provides design contrast and balance
- Black banding: Creates dynamic, striped patterns (not spotted like Sanke)
- Head quality: Black with refined pattern is critical
Visual Impact: Showa’s black foundation creates more striking appearance than Sanke, with high-contrast colors and banded patterns.
Secondary Categories
Bekko: Black-Accented Red and White
Visual Definition: Kohaku-type pattern with black markings overlaid (small accents on white areas).
Variants:
- Shiro Bekko: White base with black accents
- Aka Bekko: Red base with black accents
- Ki Bekko: Yellow base with black accents
Distinction from Sanke: Bekko black appears only on specific base colors; Sanke’s arrangement follows different logic.
Utsurimono: Reflective Patterns
Visual Definition: Dark body (black, brown, deep red) with light markings (white, red, yellow), creating inverse effect to Bekko.
Types:
- Shiroutsuri: White on black base
- Hi Utsuri: Red on black base
- Ki Utsuri: Yellow on dark base
Quality Standards: Pattern clarity, color contrast, edge quality (sharp kiwa, clean sashi).
Asagi: The Blue-Backed Classic
Visual Definition: Reticulated scaling on head and back (net-patterned), blue-gray back with red belly.
Key Indicators:
- Reticulation: Intricate, even net pattern on back and head
- Back color: Deep blue-gray with no dullness
- Belly hi: Bright red from mouth to tail base
- Head quality: Clear eyes, proportional features
- Body size: Larger body needed to display reticulation properly
Historical Significance: One of koi’s oldest varieties, predating Kohaku formalization. Shows refined aesthetic—subtle rather than bold.
Shusui: Scaleless Asagi
Visual Definition: Doitsu (scaleless) version of Asagi—blue-gray back with red belly, partial scaling along lateral line.
Key Difference: Lacks full reticulation of Asagi; pigments appear more vibrant without scale refraction. Shows German mirror carp influence.
Koromo: Reticulated Red and White
Visual Definition: Kohaku-type pattern with black reticulation over red areas, creating “robed” appearance (koromo = robe).
Variants:
- Ai Koromo: Black reticulation over red
- Aka Koromo: Lighter reticulation
- Sumi Goromo: Heavy black reticulation
Quality Standards: Even reticulation pattern, red showing through (not obscured), Shiroji equals Kohaku standards.
Kawarimono: The Miscellaneous Group
Visual Definition: “Changing things”—miscellaneous single-colored or unusual varieties not fitting other classifications.
Included Varieties:
- Chagoi: Chocolate or olive-brown solid color
- Kigoi: Golden yellow solid color
- Muji: Single solid colors without pattern
- Soragoi: Blue-gray solid color
Philosophy: Provides flexibility for rare fish meriting recognition despite not fitting standard categories.
Metallic Varieties
Hikarimuji (Ogon): Solid Metallics
Visual Definition: Solid metallic color with no patterns—gold, platinum, or copper throughout.
Main Types:
- Kin Ogon: Solid gold
- Gin Ogon: Platinum or silver
- Aka Ogon: Red-gold or rose-gold
Quality Standards:
- Luster: Reflectivity and glow quality
- Color saturation: Even throughout body
- Body conformation: Standard torpedo shape critical (no pattern to distract)
- Fin quality: Perfection required without pattern to balance imperfections
Challenge: With no pattern, body quality becomes paramount. Every imperfection is visible.
Hikari Utsurimono: Metallic Reflective
Visual Definition: Metallic versions of Utsurimono patterns—metallic dark base with lighter metallic or light markings.
Distinction from Hikarimoyo: Darker metallic contrast; stronger color separation.
Hikarimoyo: Metallic Multi-Color
Visual Definition: Two or more metallic colors (gold, platinum, copper)—Kohaku-type pattern with metallic sheen.
Quality Standards: Each color displays lustrous qualities, pattern clarity equals non-metallic standards, clean color transitions.
Kinginrin: Scale-Edge Metallics
Visual Definition: Non-metallic body with metallic scale edges—gold (kin) or silver (gin) reflectivity on each scale.
Application: Can be applied to any non-metallic variety (Kohaku, Sanke, Asagi, etc.), creating glittering effect when fish moves.
Quality Standards: Even scale-edge coloring, no missing or dull scales, underlying pattern clarity excellent.
Specialized Varieties
Tancho: The Singular Mark
Visual Definition: Single circular or oval spot on head only, mimicking Japanese flag (red circle on white).
Quality Standards:
- Mark positioning: Centered, well-proportioned
- Mark shape: Round, clear edges preferred
- Pristine white body: No other markings
- Body quality equals non-patterned standards
Doitsu: Scaleless and Partial-Scaled
Visual Definition: Genetic modification (German mirror carp ancestry)—either completely scaleless or partially scaled.
Variants:
- Mirror Doitsu: Single row of large scales along lateral line
- Linear Doitsu: Scales along back and belly only
- Completely scaleless: Leather-like appearance
Purpose: Better pigment visibility, different aesthetic appeal, controversial among traditionalists.
Goshiki: Five-Colored Complexity
Visual Definition: Complex multi-colored variety—black base with overlaid patterns containing black, red, white, yellow, and brown.
Quality Standards: Color clarity despite complexity, pattern harmony, body structure and proportion critical.
Appreciation: Appreciated more by experienced enthusiasts; requires deeper study than beginner varieties.
Variety Appreciation Progression
Collectors typically progress:
- Beginners: Attracted to Gosanke (bold, recognizable patterns)
- Intermediate: Explore Bekko, Utsurimono, Asagi (subtle distinctions)
- Advanced: Appreciate Koromo, Goshiki, rare Kawarimono (complex patterns)
- Specialists: Focus on single variety group depth