Translation guide
A philosophical term for a thing as it is in itself, independent of perception. In Japanese, this is primarily expressed through the established philosophical term 本体 (hontai), with related concepts like 物自体 (monojitai) for Kant's 'thing-in-itself'. This is a specialized term with limited everyday use.
The object of rational intuition, or a thing as it is independently of any perception or conceptualization.
The standard philosophical term for 'noumenon', used in academic contexts to refer to the true essence or substance of a thing, as opposed to its phenomenal appearance.
In Kantian philosophy, the noumenon is considered unknowable.
Specifically refers to Kant's 'thing-in-itself' (Ding an sich). Often used in discussions of transcendental idealism.
Means 'reality' or 'actual existence'. In some philosophical contexts, it can be used to refer to the noumenal realm, but it is broader and less precise than 本体.
Do not attempt to translate 'noumenon' literally as ヌーメノン (nūmenon) in Japanese, as this is not a recognized term. Use the established philosophical vocabulary above.
In non-philosophical contexts, 'noumenon' is rarely used. If you need to express the idea of an underlying essence, consider using 本質 (ほんしつ, essence) or 実体 (じったい, substance) instead, depending on the nuance.
The thing-in-itself lies beyond the scope of our experience.
現象の背後にある実在を探究する。
To investigate the reality behind phenomena.