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.
In this field, that has become the established theory.
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.
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.
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.
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.
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.
This is the established theory in the field.
The established theory was challenged by new evidence.
In marketing, that theory is the established one.