You watch the same Japanese woman in two different settings on the same afternoon. In the first, she’s at her job in a department store, helping a customer locate a product. Her voice is high and bright, her sentences are long and elaborate, full of unfamiliar verbs you don’t recognize even if you know basic Japanese: irasshaimase, gozaimasu, oukagai itashimasu, yoroshikereba. She bows constantly. The customer responds in normal polite Japanese, comparatively brief. In the second setting, after work, she’s at a small bar with two close friends. Her voice has dropped half an octave. Her sentences are short, sometimes barely sentences at all. She uses verb forms — iku, taberu, miru — that the customer-facing version of her would never have used in front of someone she was serving. She is the same person; the language she’s using is functionally a different language.
This is keigo (敬語), the Japanese system of honorific speech, and it is one of the most distinctive features of the Japanese language. Most languages have polite registers — formal vs informal address, respectful vs casual vocabulary. Japanese has elaborated this into a multi-tiered system in which the speaker’s relationship to the listener and to the person being talked about is encoded in the verb forms themselves. Native speakers spend years acquiring fluency in keigo. Non-native speakers usually use a simplified version that’s acceptable in most situations but stops short of full nuance.
Table of Contents
- What the word literally is
- The three registers
- Sonkeigo — respectful speech
- Kenjogo — humble speech
- Teineigo — polite speech
- Common verb pairs
- When to use which
- Common errors
- A practical strategy for non-native speakers
- The principle underneath
What the word literally is
敬語 (keigo) reads as kei (敬, respect) + go (語, language / speech). Literally: “respectful language.” The word names not a single register but the entire system of honorific speech in Japanese, which is conventionally divided into three parts: sonkeigo (尊敬語, respectful speech, used about others), kenjogo (謙譲語, humble speech, used about oneself in relation to others), and teineigo (丁寧語, polite speech, the baseline polite register).
A skilled keigo user moves continuously among these three depending on whom they’re addressing, whom they’re talking about, and what social setting they’re in. The complexity is real — Japanese university students take entire courses on keigo before entering the workforce, and major errors are flagged in job interviews and customer service training.
The three registers
The three keigo registers do different work:
Sonkeigo (尊敬語) — elevates the social position of the person being talked about. Used when speaking about a customer, a senior, a teacher, a guest, anyone you wish to honor. Kenjogo (謙譲語) — lowers the social position of yourself or your in-group when speaking to someone you wish to honor. The same action sentence becomes “humble” by replacing the self-referent verbs with kenjogo forms. Teineigo (丁寧語) — the baseline polite register, marked primarily by the -masu verb endings and desu copula. This is the most common form in everyday public speech and is what foreigners typically learn first.
A single sentence can mix all three. “The customer is going to the eighth floor; I will accompany her” might use sonkeigo for the customer’s “going,” teineigo for the basic sentence structure, and kenjogo for the speaker’s “accompanying.”
Sonkeigo — respectful speech
Sonkeigo elevates the verb describing the other person’s action. Common patterns:
Verb replacement — completely different verbs replace common ones: – iku / kuru (go / come) → irassharu – iu (say) → ossharu – taberu / nomu (eat / drink) → meshiagaru – suru (do) → nasaru – miru (see) → goran ni naru
O- prefix + ni naru pattern — for verbs without a dedicated sonkeigo form: – kaku (write) → o-kaki ni naru – yomu (read) → o-yomi ni naru
Honorific suffixes on titles and names — -sama (most respectful), -san (standard), with -kun, -chan reserved for less formal relationships.
When a customer service worker says “okyakusama, kochira ni o-suwari ni narimasu ka?” — “would you (honored customer) sit here?” — the o-suwari ni narimasu is the sonkeigo form of “sit,” elevating the customer’s action.
Kenjogo — humble speech
Kenjogo lowers the verb describing the speaker’s action when addressing someone elevated. Common patterns:
Verb replacement — humble forms: – iku / kuru (go / come) → mairu / ukagau – iu (say) → moshiageru / moushimasu – taberu / nomu (eat / drink) → itadaku – suru (do) → itasu – miru (see) → haiken suru
O- prefix + suru pattern — for verbs without a dedicated kenjogo form: – okuru (send) → o-okuri suru – tetsudau (help) → o-tetsudai suru
The speaker who says “ashita wa Tokyo e mairimasu” instead of “ashita wa Tokyo e ikimasu” is using kenjogo to humble their own act of going, which only makes sense when the listener is someone whose status the speaker is honoring.
A common error for non-native speakers is using kenjogo about other people’s actions, which produces a comic effect — like saying “your honor will eat humbly” instead of “your honor will eat respectfully.” Kenjogo is reserved for the speaker’s side of the action.
Teineigo — polite speech
Teineigo is the baseline polite register and is what most non-native speakers learn first:
The masu/desu form: – Plain: Watashi wa Tokyo ni iku. (I go to Tokyo.) – Teineigo: Watashi wa Tokyo ni ikimasu. (I go to Tokyo, polite.) – Plain copula: Sore wa hon da. (That is a book.) – Teineigo: Sore wa hon desu. (That is a book, polite.)
Honorific prefixes — o- and go- on certain nouns to add polite framing: – cha (tea) → o-cha – kane (money) → o-kane – kazoku (family) → go-kazoku
Teineigo doesn’t elevate or humble; it just marks the speaker as being in a polite register rather than a casual one. It’s the appropriate default for any conversation with someone you don’t know intimately, and it’s required in most business and public settings.
Common verb pairs
A few verbs come up so often that knowing their three forms is high-value:
iku / kuru (to go / to come) — Plain: iku, kuru. Sonkeigo: irassharu. Kenjogo: mairu, ukagau. Teineigo: ikimasu, kimasu. suru (to do) — Plain: suru. Sonkeigo: nasaru. Kenjogo: itasu. Teineigo: shimasu. iu (to say) — Plain: iu. Sonkeigo: ossharu. Kenjogo: moushiageru / mousu. Teineigo: iimasu. taberu (to eat) — Plain: taberu. Sonkeigo: meshiagaru. Kenjogo: itadaku. Teineigo: tabemasu. iru (to be / exist, animate) — Plain: iru. Sonkeigo: irassharu. Kenjogo: oru. Teineigo: imasu. miru (to see) — Plain: miru. Sonkeigo: goran ni naru. Kenjogo: haiken suru. Teineigo: mimasu.
Recognizing these forms in real Japanese conversation is the first practical step. Producing them at the right moment is the second, and that’s the part that takes years.
When to use which
The choice of register depends on the relationship and the setting:
With customers (in service settings) — full sonkeigo for the customer’s actions, kenjogo for the worker’s actions, very high politeness. This is the densest keigo Japanese speakers produce. With workplace seniors — sonkeigo when talking about them, kenjogo when talking about your own actions affecting them. Teineigo as the baseline. With teachers, doctors, and other professionals you’re consulting — similar to workplace seniors. Sonkeigo / kenjogo when warranted; teineigo as default. With strangers and public-facing situations — teineigo as default. Sonkeigo creeps in if the stranger is older or in a position you wish to acknowledge. With friends and close family — plain forms (futsuukei, 普通形). Using teineigo or higher with close friends sounds cold or distant; using plain forms with seniors or customers is rude. With juniors at work — typically plain forms or teineigo. Using sonkeigo about a junior is unusual and may sound sarcastic. With your own family when speaking to outsiders — interestingly, you do not use sonkeigo for your own family, even if they’re seniors. Talking about your father to a colleague: “chichi” (humble) not “o-tousan” (elevated). Talking about the colleague’s father: “o-tousan” (elevated).
This last pattern — humbling your own in-group when speaking to outsiders — connects to the broader Japanese concept of uchi (内, inside / in-group) vs soto (外, outside / out-group). In keigo terms, your in-group is honored downward when speaking to the out-group, and the out-group is honored upward.
Common errors
Even native speakers make keigo errors, and certain mistakes are widely remarked on:
Bairokeigo (バイト敬語) — “part-time worker keigo,” a colloquial label for the somewhat awkward over-formal speech often produced by inexperienced retail workers. Phrases like “kochira yoroshikatta deshou ka?” (“would this have been okay?”, with weird past tense) or “sen-en kara o-azukari shimasu” (“I will humbly receive from a thousand yen”) are technically defensible but stylistically off. Mixing sonkeigo and kenjogo — using sonkeigo about yourself or kenjogo about a senior. These produce immediate cringe in listeners. Double honorifics (nijukeigo, 二重敬語) — stacking honorific markers redundantly. O-meshiagari ni naru uses both o- honorific prefix and the sonkeigo verb meshiagaru; this is technically over-marked. Some double honorifics have become accepted through long use, others remain incorrect. Using teineigo where sonkeigo is required — speaking to a customer or senior in plain -masu form when the situation calls for full elevated speech reads as undertrained or disrespectful.
These errors have real consequences in customer-facing jobs, where keigo training is part of basic onboarding.
A practical strategy for non-native speakers
Most non-native learners of Japanese will not achieve native-level keigo competence, and trying to is often counterproductive — overreaching with elaborate sonkeigo or kenjogo and getting it wrong is more awkward than staying in clean teineigo.
A practical strategy:
Master teineigo thoroughly first. Reliable, correct -masu / desu with honorific o- prefixes covers the vast majority of everyday situations. Learn to recognize sonkeigo and kenjogo without producing them. Customer service speech, business meeting speech, and TV interviews use these forms heavily. Recognizing them helps you parse what’s being said even when you couldn’t generate it yourself. Learn five or six high-frequency sonkeigo and kenjogo verbs to use selectively. Irassharu, ossharu, meshiagaru, mairu, itadaku, itasu will cover most of what you need to produce. When in doubt, default to teineigo with apologies. Saying “sumimasen, keigo ga yoku wakarimasen” (“sorry, I don’t know keigo well”) in a situation that calls for it is socially acceptable and disarms most expectations.
The goal for most non-native learners is not full fluency but correct register — knowing when polite speech is required and producing a clean version of it.
The principle underneath
What keigo really demonstrates is what happens when a language fully encodes social hierarchy into grammar rather than relying on word choice or tone. Most languages communicate respect through some combination of vocabulary, intonation, and indirect phrasing. Japanese has built it into the conjugation system: the verb itself changes form depending on who is doing the action and whom you are addressing.
The cultural consequence is that Japanese speakers are constantly performing real-time social calibration as they speak. Choosing whether to say iku or irassharu or mairu requires assessing the relationship between speaker, listener, and the person being talked about, all in the moment of forming the sentence. Native speakers do this automatically; non-native speakers experience it as cognitively expensive.
For a non-Japanese reader, the practical takeaway is that Japanese conversation is doing more relational work than its English translations usually convey. Two grammatical English sentences (“she is going to Tokyo” / “she is going to Tokyo”) may correspond to wildly different Japanese ones depending on who “she” is in the social hierarchy. Recognizing keigo as a layer underneath the literal content opens up a dimension of Japanese conversation that isn’t visible from the translated surface.