# koi vs koji

> English confusable word pair

## The two words

### koi
*noun · IPA /kɔɪ/ · frequency rank #26,483*
Ornamental domesticated varieties of the Amur carp (Cyprinus rubrofuscus), of Japan and eastern Asia with red-gold or white coloring.

### koji
*noun · IPA /ˈkoʊd͡ʒi/ · frequency rank #46,016*
A substance that is produced by letting a mold, especially Aspergillus oryzae, grow on rice, barley, soybeans, etc., used to make fermented products such as sake, amazake, miso, and soy sauce.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/vs/koi-vs-koji