Refers to a person's innate disposition or the fundamental nature of something. Often used in formal or literary contexts.
He was diagnosed with true diabetes.
His true nature is very kind.
noun which may take the genitive case particle 'no'
Used as a no-adjective to describe something that is authentic, inherent, or not superficial. Common in medical or technical contexts (e.g., 真性糖尿病 'true diabetes').
This is a genuine diamond.
True artists are rare.
本物 is an everyday noun for 'the real thing', while 真性 is a more formal, often technical word used attributively (真性の〜) to mark authenticity or an underlying essential quality.
天性 highlights an inborn talent or gift someone is born with, whereas 真性 more broadly describes inherent or essential nature, not necessarily a talent.
本質 refers to the fundamental essence of a thing or matter in a philosophical sense, while 真性 is often used to mark something as genuine or non-superficial, especially in medical terms.
Compound of 真 (しん, 'true') and 性 (せい, 'nature, character'). The reading is on'yomi, and the word is used in both classical and modern Japanese to denote inherent or genuine qualities.