Overview
Medaka no Yakata's own historical catalog and Oba's published first-person account document key milestones in ornamental Medaka selection and the origins of the Yang Guifei house name.
Claim-by-claim evidence
| Research finding | Evidence class | Direct references |
|---|---|---|
| Medaka no Yakata's historical catalog credits Oba with early 2000s ornamental varieties | First-party historical catalog | O1 ↗ |
| The catalog identifies Youkihi (Yang Guifei) as a 2004 vermilion/red-orange line | First-party dated creator record | O1 ↗ O3 ↗ |
| Oba's account traces selection from golden lines through Kohaku to an exceptional red-orange female and descendants | First-person selective-breeding account | O2 ↗ |
| The formal phenotype name 朱赤 and the nickname 楊貴妃 are distinct naming layers | Classification/historical account | O3 ↗ O4 ↗ |
| A numbered descendant or modern trade line is not automatically identical to all other numbered descendants of the original stock | Lineage identity caveat | O2 ↗ |
Evidence labels refer to documentary strength. They do not assert independently tested genetics.
Known research gaps
- The original founding date of every associated business entity is not established by the strain timeline.
- Actual genetic fixation and molecular loci are not established by the historic account.
- Subsequent selected lines and retailer nicknames require separate breeder-level provenance.
Related profiles and lineages
Original research sources
Every row above links directly to its cited reference; publication or creation years are not interchangeable.
- O1: Medaka no Yakata historic breeder catalog — First-party dated catalog
- O2: Yukio Oba: first-person Youkihi origin narrative — Breeder's first-person account
- O3: Medaka WEB Zukan: Youkihi — Specialist historical record
- O4: Japanese Medaka Association historical classification — Association classification history