---
name: japanese-language
description: Use when asked to write, translate into, or check text in Japanese (日本語) — the mixed kanji/hiragana/katakana writing system, the grammatically-encoded keigo honorific system, and subject-object-verb order with frequent subject omission — spoken mainly in Japan.
---

# Japanese Language

Japanese (日本語, Nihongo) is spoken mainly in Japan, with substantial
communities of speakers elsewhere. It combines three writing systems in
ordinary text, marks politeness and social relationship directly in verb
grammar, and orders sentence elements very differently from English.

## Writing system: three scripts used together

Real Japanese text mixes all three of the following in a single
sentence — it is not a choice of one script over another the way
Simplified vs. Traditional Chinese is:

- **Kanji** (漢字) — Chinese-derived characters used for the core
  content words: most nouns, and the stems of verbs and adjectives.
- **Hiragana** (ひらがな) — a syllabary used for grammatical elements
  (verb/adjective endings, particles) and for native words that either
  have no common kanji or are conventionally written in kana.
- **Katakana** (カタカナ) — a syllabary used mainly for loanwords from
  languages other than Chinese, foreign names, onomatopoeia, and text
  needing visual emphasis (similar to italics in English).

A sentence like "私はコーヒーを飲みます" (I drink coffee) uses kanji
(私, 飲) hiragana (は, を, み, ます) and katakana (コーヒー) all at once.
Writing everything in one script, or replacing kanji with hiragana
throughout, is not a neutral stylistic simplification — it reads as
childish, or in some contexts as if the writer cannot use kanji.

## Keigo: grammatically encoded honorifics

Japanese formality is not just word choice — it is built into verb
conjugation itself through the **keigo** system, with several
overlapping dimensions:

- **Teineigo** (polite form) — the baseline polite register using
  -masu/-desu verb endings, appropriate for most interactions with
  people outside one's inner circle.
- **Sonkeigo** (respectful language) — elevates the listener or a
  third person being discussed, used for superiors, customers, or
  people of higher status.
- **Kenjōgo** (humble language) — lowers the speaker's own actions
  relative to the listener, often via entirely different verb forms
  (e.g. いたします instead of します for "to do").

Which register to use depends on the relative status and social
distance between speaker, listener, and any third party mentioned, and
it must generally stay consistent across a whole passage — mixing casual
verb endings into an otherwise polite paragraph, or vice versa, reads as
a clear error rather than a stylistic quirk.

## Word order and subject omission

Japanese is subject-object-verb (SOV): the verb comes last, and
particles (は, が, を, に, で, and others) mark each element's
grammatical role rather than word order alone doing so. Subjects,
objects, and even whole clauses are routinely omitted when clear from
context — unlike English, which generally requires an explicit subject
in every sentence. A sentence that literally translates as just
"went" can be a complete, natural Japanese sentence when the speaker is
already clear from context; forcing an explicit subject/pronoun into
every sentence when translating into Japanese produces unnatural,
overly explicit text.

## Formal/written vs. casual/spoken register

Beyond keigo's status-marking, Japanese has a separate register axis
between formal written Japanese (which favors -masu/-desu endings,
fuller sentence structure, and more kanji) and casual spoken Japanese
(plain-form verb endings, sentence-final particles like よ/ね/わ, and
more contractions). This choice runs through an entire text, not just
individual words — a novel's narration, a business email, and a text
message between friends read as distinctly different registers from the
first sentence.

## Common pitfalls

- Writing a sentence entirely in one script, or overusing hiragana
  where kanji is conventional, which reads as unnaturally simplified.
- Mixing keigo levels inconsistently within one passage — starting
  polite and slipping into casual plain form, or the reverse.
- Using sonkeigo (respectful) forms to describe one's own actions
  instead of kenjōgo (humble) forms — a common and noticeable error.
- Inserting explicit subject pronouns (私, あなた) in every sentence
  when context already makes the subject clear, producing stilted text.
- Treating katakana loanwords as freely interchangeable with their
  kanji/hiragana native-word equivalents — they often carry different
  nuance or register.

## Learn more

- [[korean-language]] for a comparably central honorific system
  realized through different grammar and a different script.
- [[mandarin-chinese-language]] for the source of kanji's characters,
  now diverged in form (Simplified/Traditional) and reading.
- [[cross-cultural-communication]] for the social-relationship context
  that keigo choices depend on.