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AQUAPEDIA / SOURCE-LINKED RESEARCH

Japan Blue (Kawato)

ジャパンブルー

Breeder-attributed historical Medaka varietyEvidence by claimIndependent review ongoing

Kawato's Japan Blue black-bodied Miyuki-type blue exterior-light selection.

Picture gene & lineage tree

Visual pedigree of breeder-reported inputs, where available. Dashed arrows represent documentary claims or selection history, not DNA-tested genes.

Horizontal branching Medaka lineage. American name: Japan Blue (Kawato); Japanese romaji: not verified; Japanese characters: ジャパンブルー. Dashed connectors show breeder-reported input or selection history; they do not prove genetic parentage. Documented source links and evidence qualifiers follow the diagram.AQUAPEDIA / MEDAKA LINEAGE ATLASSTRAIN PEDIGREEREPORTED LINEAGEDASHED BRANCHES • REPORTED INPUTS / SELECTION STAGESNot an individual-fish pedigree or DNA / dominance test.REPORTED INPUT / STAGE 1Yellow-black exterior-light breedingpopulationREPORTED INPUT / STAGE 2Blue exterior-light selected oversuccessive generationsFOCAL STRAINAMERICAN / ENGLISH NAMEJapan Blue (Kawato)JAPANESE NAME (ROMAJI)Not verifiedJAPANESE LETTERS (日本語)ジャパンブルー
Dashed connectors show breeder-reported input or selection history; they do not prove genetic parentage. Not a confirmed genotype or parent-fish identification.

Documented color-selection stages; separate from Amano Black Miyuki Source: Medaka WEB Zukan No.0899, Kawato's Japan Blue history

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Lineage review · Batch 017: A breeder-recorded foundation, selection stage or form derivation is shown with dashed lines. The diagram is not DNA proof and may not identify individual parent fish. Specialist source ↗

Overview

Kawato's Japan Blue black-bodied Miyuki-type blue exterior-light selection. The evidence below is based on a documented specialist variety entry, not independently verified laboratory genetics.

Claim-by-claim evidence

Research findingEvidence classDirect references
The specialist variety catalogue identifies Hirotaka Kawato / 川戸博貴 as the original maker for the 2020 record.Documented specialty-catalogue attribution, not independently authenticated creator correspondenceJ899 ↗
Dark/black body with blue-colored dorsal exterior reflection.Source-defined phenotype and classification, not DNA genotypeJ899 ↗
Medaka WEB Zukan lists 2020 Kawato origin, Japan Blue nickname, and a black exterior-light phenotype.Specialist historical selection summary; precise broodstock not verifiedJ899 ↗
Despite a similar marketing name, this entry is not the earlier 2014 Amano Black Miyuki identity.Differentiation from another historical name or pedigree limitationJ899 ↗

Evidence labels refer to documentary strength. They do not assert independently tested genetics.

Known research gaps

  • No independently inspected original breeder register, genotype assay or complete individual parent-fish mating ledger is available.
  • Source attribution and the historical year should not be interpreted as confirmed first retail sale date or authentication of present-day fish.
  • External catalogue images are not republished without separately verified copyright/reuse permission.

Related profiles and lineages

Original research sources

Every row above links directly to its cited reference; publication or creation years are not interchangeable.