Translation guide
Refers to a widely accepted explanation or framework in a field of study. In Japanese, the most common equivalent is 定説 (ていせつ), but other terms like 既成理論 (きせいりろん) or 通説 (つうせつ) may be used depending on context.
To refer to a theory that is generally accepted by experts in a particular field.
The most direct and common translation for 'established theory'. Used in academic and formal contexts.
この分野では、それが定説となっている。
In this field, that has become the established theory.
定説に挑戦する研究が増えている。
Research challenging the established theory is increasing.
Commonly accepted view or prevailing opinion. Slightly less formal than 定説, often used in humanities and social sciences.
歴史学の通説によれば、その事件は偶然だった。
According to the established theory in history, the incident was accidental.
Literally 'pre-existing theory'. Used when emphasizing that a theory is already established and may be challenged by new ideas. More technical.
彼の研究は既成理論を覆すものだった。
His research overturned the established theory.
To describe a theory that is the standard or orthodox view in a particular area, sometimes with a connotation of being traditional.
Orthodox theory. Emphasizes that the theory is the accepted standard, often with a nuance of being traditional or mainstream.
経済学の正統的理論では、市場は効率的だとされる。
In orthodox economic theory, markets are considered efficient.
Colloquial expression meaning 'standard theory' or 'go-to theory'. Used in casual or business contexts, not strictly academic.
マーケティングでは、あの理論が定番の理論だ。
In marketing, that theory is the established one.
定説 (ていせつ) is the most direct translation and is widely used in natural sciences and formal writing. 通説 (つうせつ) is more common in humanities and implies a widely held view rather than a rigorously proven theory. In many contexts they are interchangeable, but 定説 sounds more definitive.
The literal translation '確立された理論' (かくりつされたりろん) is understandable but sounds unnatural and wordy. Use 定説 or 通説 instead.
これがこの分野の定説です。
This is the established theory in the field.
新しい証拠によって定説が覆された。
The established theory was challenged by new evidence.