koji

/ˈkoʊd͡ʒi/

//ˈkoʊd͡ʒi// noun

By · According to Wiktionary data (CC BY-SA) ·

"koji" is a 4-letter English headword indexed on PlainSpell.

The verdict

“koji” has 5 generated spelling variants in the English index at frequency #46,016. The variants make it a useful spelling check.

#46,016
frequency rank, English
1,236
“K” headwords
5
tracked misspellings
20
confusable pairs

According to Wiktionary data (CC BY-SA, analyzed September 3, 2026) - 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.

Corpus desk

Index EN-koji · koji · English

koji · rank #46,016 · 5 variants · 20 confusables

  • FREQ-MID #46,016
  • LEN-MID 4 letters
  • VOW-2 2 vowels
  • CONFUS-HIGH 20 pairs
  • VAR-MID 5 variants
  • BOOK-MID 1,236
  • PHOTO-FINISH Kitt

Nearest frequency peer: Kitt (-1 rank slots)

Read with this headword: Spelling guide for this pattern

Desk codes from Wiktionary headword shape, FrequencyWords rank tier, confusable-pair count, generated misspelling depth, letter-cohort book size, and photo-finish peer. Not a difficulty grade.

Rank peers near misspelling magnet “koji”

Same rarity band: useful when a typo lands on a peer headword

corpus weight

What this shows “koji” sits among these FrequencyWords peers; misspelling depth is tracked separately in the edit-distance chart.

Source FrequencyWords open word-frequency list As of September 3, 2026

Visual similarity to commonly confused words

How many letter changes separate each confused pair (Levenshtein distance, normalized).

koji vs Kos
25% similar
koji vs Koo
25% similar
koji vs Kok
25% similar

Source: PlainSpell confusable corpus (Wiktionary, CC BY-SA).

Key facts for koji
PropertyValue
Headwordkoji
LanguageEnglish
Part of speechNoun
IPA/ˈkoʊd͡ʒi/
Letters4
Frequency rank#46,016
Misspellings tracked5
Confusable pairs20
SourceWiktionary (kaikki.org)

Frequency seat of misspelling magnet “koji”

Word frequency stretches from the small set of words we reach for constantly (left) out to the long tail barely used once in a while (right).kojilands here:

#1#100#1K#10K#100K
← used constantlyrarely used →

Ticks step logarithmically, so each one marks a roughly tenfold drop in how often the word turns up. Same rarity band neighbours include “Kitt” (#46,015), “Kyoko” (#46,017), “Kilgore” (#46,014). Among 1,236 “K” headwords, “koji” is #46,016. Source: FrequencyWords open word-frequency list.

A misspelling magnet

The generator records 5 spelling variants around koji (IPA /ˈkoʊd͡ʒi/), anoun. Corpus frequency is #46,016 among 1,236 “K” headwords. Wiktionary lists 2 senses, so context still picks the gloss.

Our generated misspelling index lists 5 likely wrong-spelling variants for koji, with forms such as "kjoi", "kkoji", and "koij". Each of these forms differs from the correct spelling by one small edit: a doubled letter, a dropped silent letter, or a substituted vowel. It also participates in 20 confusable-pair relationships, "Kos", "Koo", "Kok", and more, a pairing that trips writers up because the two words share enough sound or shape to blur together.

Etymologically, the entry records: Borrowed from Japanese 麹 (kōji). The correct English form is koji, spelled K-O-J-I.

Definition

  1. 1
    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.
  2. 2
    The mold used in such a preparation.

Etymology

Borrowed from Japanese 麹 (kōji).

Common misspellings

Also misspelled as:

  • kjoi
  • kkoji
  • koij
  • kojji
  • okji

Misspelling Pattern Breakdown

How far each generated variant is from the correct spelling of koji - expressed in single-character edits (insert, delete, or swap one letter). Bigger bars stand out at a glance; a one-edit slip is the hardest to catch.

kjoi2kkoji1koij2kojji1okji2
Edit distance from "koji"

Definitions, pronunciation, and etymology for this entry are drawn from Wiktionary via the kaikki.org structured extract (CC BY-SA); frequency ordering uses the FrequencyWords open word-frequency list (2018 English corpus, MIT). See the methodology for how each field is sourced and updated.

Frequently Asked Questions

How do you spell "koji"?
"koji" is spelled K-O-J-I. The IPA pronunciation is /ˈkoʊd͡ʒi/.
What does "koji" mean?
As a noun, "koji" means: 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.
What words are commonly confused with "koji"?
"koji" is commonly confused with "Kos", "Koo", "Kok". These words look or sound similar but have different meanings. PlainSpell provides detailed comparisons for each pair.
How do you pronounce "koji"?
The IPA (International Phonetic Alphabet) transcription for "koji" is /ˈkoʊd͡ʒi/. Click the speaker icon on the pronunciation badge above to hear it spoken aloud where audio is available.
What is the origin of the word "koji"?
Borrowed from Japanese 麹 (kōji). See the full etymology section above for more details.
Is PlainSpell free to use?
Yes, PlainSpell is a completely free word reference. You can look up definitions, pronunciations, confusable pairs, homophones, and spelling corrections across 5 languages without any sign-up or subscription.

Similar English words by spelling shape

Same letter count and similar misspelling depth for "koji", not the corpus desk frequency band.

Same letter count

Frequency-ranked English headwords with 4 letters (nearest by frequency rank).

Kitt#46,015jell#46,006loam#46,031Lodi#46,032

Similar misspelling depth

Headwords with a similar count of attested misspellings (5 here; floor ≥5).

Hutu5 variantsmofo5 variantsMoria5 variantsFells5 variants

Source: Wiktionary (via kaikki.org) Structured Wiktionary extract

Source: FrequencyWords open word-frequency list