Yuzu Kosho (Yuzu and Chili Paste)

In standard modern Japanese, 'koshō' (胡椒) means black pepper. But in the Kyushu regional dialect — where yuzu kosho originates — 'kosho' historically referred to chili pepper, especially before the 'tōgarashi' (唐辛子) terminology became dominant nationwide. Yuzu kosho preserves this dialectal usage. The condiment contains no Piper nigrum (black pepper); the 'kosho' refers entirely to chili (Capsicum annuum). Modern Japanese consumers outside Kyushu are sometimes surprised to learn this etymology.

Green yuzu kosho (青ゆずこしょう) is made from unripe green yuzu peel and green chili, producing a sharper, brighter, more herbal-citrus profile. It is the traditional and most common Kyushu form, and the default for export-market 'yuzu kosho' products. Red yuzu kosho (赤ゆずこしょう) is made from ripe yellow yuzu peel and red chili, producing a mellower, more aromatic, and slightly sweeter profile. For premium gift SKUs and gourmet foodservice supply, both styles are typically offered as a pair. For volume retail, green is standard. For modern fusion applications (pasta, dressings), red is increasingly preferred for its more rounded character.