na-adjective, noun which may take the genitive case particle 'no', noun
fine quality; high-grade; superior
Describes materials, products, or services of excellent quality. Used as a noun, na-adjective, or no-adjective.
This suit is made from fine-quality fabric.
This shop deals in fine-quality leather goods.
Please choose a bottle of high-quality wine.
This wine has a reputation for being of superior quality.
高級 stresses high price or prestige (a luxury brand), while 上質 focuses on the actual fineness of the material or workmanship.
上等 is a slightly old-fashioned word for superior quality, close in meaning to 上質 but less common in modern product descriptions.
上質 focuses narrowly on the fine material or texture of an item, while 優良 more broadly rates overall quality, performance, or condition as excellent.
粗悪 describes shoddy, poor-quality goods, the opposite of 上質's fine, superior quality.
Compound of 上 (じょう, 'upper, superior') and 質 (しつ, 'quality'). The reading is on'yomi.