Describes something unadulterated, authentic, or not mixed with impurities. Often used for substances, motives, or qualities.
I use the genuine manufacturer oil for this motorcycle.
This wine is characterized by its pure taste.
His genuine feelings came across.
Used in academic contexts to distinguish pure or theoretical study from applied or practical fields. Common in phrases like 純正数学 (pure mathematics).
He devotes himself to research in pure mathematics.
genuine (parts); official; first-party
Refers to authentic, manufacturer-branded parts, accessories, or products, as opposed to third-party or compatible items. Common in commercial and technical contexts.
Please use genuine parts for the repair.
Genuine accessories are a bit expensive but of good quality.
This part isn't genuine—it's an aftermarket one.
I replaced the broken battery with a genuine one.
I majored in pure mathematics in college.
純粋 emphasizes something unmixed or innocent in nature, while 純正 stresses official authenticity or lack of adulteration, especially in commercial or academic contexts.
本物 simply means 'the real thing' as opposed to a fake, whereas 純正 specifically implies manufacturer-certified or unadulterated genuineness.
正規 highlights official, standard-approved status (e.g. 正規品), while 純正 focuses on being made by the original manufacturer or being chemically unmixed.
純情 (naive, innocent-hearted) sounds and looks similar to 純正 but describes a person's character, not authenticity or purity of substance.
Standard kanji form; used in all senses.
Rarely used kanji form.
Compound of 純 (pure, genuine) and 正 (correct, right). The combination conveys the idea of being purely correct or authentic. The rare form 醇正 uses 醇 (rich, pure) with a similar meaning.