noun
natural fruit juice
Refers to juice made directly from fruit without additives or artificial ingredients. Often seen on product labels.
このジュースは天然果汁100%です。
This juice is 100% natural fruit juice.
果汁 is a general term for fruit juice, while 天然果汁 specifically emphasizes that it is natural and not from concentrate or artificially flavored.
Compound of 天然 (natural) and 果汁 (fruit juice).