- junsei pure, genuine, real; pure (of a subject of study; as opposed to applied, practical, etc.); genuine (parts, accessories, etc.), official, first-party
Used mainly in formal or technical contexts for genuine manufacturer parts or pure academic subjects, not for everyday authenticity.
この部品は純正ですか。
Kono buhin wa junsei desu ka.
Is this part genuine?
彼は純正数学を専攻している。
Kare wa junsei sūgaku o senkō shite iru.
He majors in pure mathematics.
⚖️ Often confused with 正規 (seiki), which means legitimate or authorized, while 純正 emphasizes being original from the manufacturer.
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