"Hiramasa Studies" is an archive based on real-world experience in offshore Japan, documenting Yellowtail Kingfish (Hiramasa) in a structured way through the lenses of ecology, behavior, culture, and thought. These articles are neither fishing reports nor how-to guides. Their purpose is to articulate "why things happen" and "under what conditions they take shape," preserving them as reusable conceptual models.
Purpose of Hiramasa Studies
This archive is not a simple collection of fishing reports or technical explanations. Its purpose is to articulate "why things happen" and "through what structures they are formed," preserving them as reusable conceptual models.
Currents, underwater structure, bait resources, fish behavior, and human involvement are recorded not as isolated events, but as interrelated structures.
The Position of This Archive
This archive is neither an academic paper nor a personal fishing diary. It is a record of thought, written from the perspective of a practitioner in the field, aiming to describe the phenomena surrounding Yellowtail Kingfish as structurally as possible.
The subjects covered range from biological classification and phylogeny to behavioral ecology, feeding-ground formation, and the structure of fishing as a practice. They also extend to Japanese mythology and linguistic culture. All of these are integrated as perspectives for understanding Yellowtail Kingfish not as fragments, but as a coherent system.
On the Distinction Between Facts and Hypotheses
This archive contains both facts derived from generally shared research knowledge and hypothesis-based interpretations drawn from the author's own field observations, navigation experience, and guide work.
The latter are not intended to replace formal biological classification or established theory, but are presented as conceptual models based on reproducibility and practical usefulness in the field.
Therefore, the purpose of this archive is not to make absolute claims of correctness, but to share frameworks that deepen understanding in practice, leaving them as primary source material that can be updated through observation and record-keeping.
Why Describe Things as "Structure"?
The author does not view Yellowtail Kingfish fishing as a mere accumulation of techniques or rules of thumb, but as a structure in which currents, underwater terrain, bait resources, fish behavior, and human intervention intersect.
What matters is not only where a fish was caught, but whether we can explain why the fish appeared there, and why it struck at that exact moment.
This archive is an attempt to articulate those structures and preserve them as reusable conceptual models.
How to Read This Archive
Each section illuminates a different aspect of Yellowtail Kingfish while remaining interconnected with the others. They can be read individually, but cross-referencing them allows for a more three-dimensional understanding.
- Species and Classification: Organizing the underlying definitions, including scientific names, naming conventions, taxonomy, phylogeny, and distribution. （Go to category）
- Field Notes from Offshore Japan: Recording currents, underwater structure, feeding grounds, and formation conditions as frameworks that can be reused in on-the-water decision-making. （Go to category）
- Culture, Myth, and Language: Interpreting the symbolic structure of fishing through the lens of mythology, belief systems, and linguistic culture. （Go to category）
The recommended reading order is: Definition (Classification) → Practice (Field) → Meaning (Culture).
Its Significance as a Record
This archive is not intended to preserve specific catches or temporary know-how. Its aim is to leave behind a referenceable slice of knowledge for the future by recording the structure of the sea, the behavior of the fish, and the ways humans engage with them as a coherent system of thought.