noun
genuine article; authentic product
Refers to a product that is pure, high-quality, and not counterfeit or adulterated. Often used in commercial or quality-control contexts.
この店では純良品だけを扱っています。
This store deals only in genuine products.
正規品 means 'authorized product' or 'official product', focusing on distribution channels, whereas 純良品 focuses on the inherent quality and purity.
Compound of 純 (pure), 良 (good), and 品 (product). The exact historical derivation is uncertain, but the meaning is transparent from its components.