Kawarimono koi classification: The diverse non-metallic show class

Kawarimono (meaning "unusual ones" or "eccentric things"), also referred to as Kawarigoi, is a broad, non-metallic show classification established by Japanese judging associations to house all recognized, non-metallic Nishikigoi varieties that do not fit into Gosanke (Kohaku, Sanke, Showa), Utsurimono, Bekko, or Asagi-Shusui classes. Encompassing single-colored giants like Chagoi, Soragoi, and Benigoi, deep jet-black varieties like Karasugoi and Hajiro, and patterned oddities like Ochiba Shigure, Midorigoi, and Kumonryu, Kawarimono is prized for its variety and jumbo conformation.

Key takeaways

• Kawarimono is an omnibus show category for all non-metallic varieties outside traditional classes.
• Includes single-colored varieties: Chagoi (brown), Soragoi (gray), Benigoi (solid red), and Kigoi (solid yellow).
• Includes black-bodied varieties: Karasugoi (crow koi), Hajiro (white fin tips), and Hageshiro (white head and fins).
• Body conformation and skin quality outweigh pattern complexity in Kawarimono show judging.
• Any presence of metallic sheen (hikari) disqualifies a fish from Kawarimono, shifting it to Hikarimoyo or Hikarimuji.

The role of Kawarimono in Japanese show exhibitions

In major Japanese competitions like the All Japan Combined Nishikigoi Show, entries are divided into specific breed classes to ensure equitable judging. Varieties that lack sufficient competition to warrant their own dedicated category compete collectively under Kawarimono.

Judging a class containing brown, gray, yellow, and jet-black fish simultaneously presents unique challenges. Judges evaluate these entries by stripping away pattern preferences and focusing on universal qualities: body conformation, broad bone structure, thick tail tubes, and deep, elastic skin luster (teri).

Single-colored giants: solid varieties

Single-colored fish form the backbone of the Kawarimono class. Because these fish lack contrasting pattern steps, any skin blemish, stray scale, or spinal deviation is immediately apparent. A top-tier Chagoi or Soragoi must display impeccable net scale reticulation (matsuba) along the spine and a massive, muscular body frame.

Benigoi is a solid, lacquer-red fish. Unlike an Aka Hajiro which carries white fin tips, a pure Benigoi must have deep persimmon-red coloration extending through the belly and to the very tips of all fins. Kigoi is a solid lemon or mustard-yellow variety, frequently bred as an albino carrying red eyes (Akame Kigoi).

The black crow family: Karasugoi, Hajiro, and Hageshiro

The black varieties in Kawarimono descend from ancient black Magoi ancestors. Karasugoi (the crow koi) is solid lacquer black from head to tail, with dark sumi wrapping completely across the belly. A true Karasugoi absorbs light like coal, making it look like a silhouette passing through the water.

Variations within the crow family depend on white accent placement. Hajiro displays pure white tips on the leading pectoral and caudal fin rays, like a bird in flight. Hageshiro adds a pure white forehead marking to the white fin tips, while Yotsushiro exhibits white on the head and all four fins.

How to classify and evaluate a Kawarimono koi step by step

1. Inspect the scales under direct natural sunlight: confirm the skin is completely non-metallic, free of metallic sheen (hikari).
2. Rule out standard classes: confirm the fish is not a Kohaku, Sanke, Showa, Utsurimono, Bekko, or Asagi.
3. Check solid colors: identify tea-brown as Chagoi, blue-gray as Soragoi, solid red as Benigoi, and bright yellow as Kigoi.
4. Check black fish: identify solid black as Karasugoi, white-tipped fins as Hajiro, and white skull with white fins as Hageshiro.
5. Evaluate body conformation: look for a broad, muscular shoulder profile, wide head, and thick caudal peduncle.
6. Examine skin purity: confirm single-colored fish have zero black freckles (shimi) or mismatched regrown scales.

Related pond care guides

Learn about the most popular Kawarimono variety in our guide onChagoi koi temperament and growthfor jumbo keeping.

Conformation scoring principles are covered inkoi body conformation judging and shapeto understand structural evaluation.

Common questions

Can a koi with metallic shine compete in Kawarimono?

No. Any metallic luster automatically disqualifies a fish from Kawarimono. Metallic fish are placed into Hikarimuji (single-colored metallic) or Hikarimoyo (patterned metallic).

Why are Kawarimono varieties often recommended to new pond owners?

Varieties like Chagoi and Soragoi possess calm, docile dispositions that tame the entire pond. They are also genetically hardy, grow faster than Gosanke, and quickly learn to feed directly from human hands.

What is a Midorigoi?

Midorigoi is a rare Kawarimono variety displaying a soft pale green or chartreuse-yellow body color, produced by crossing Shusui with female Yamabuki Ogon.