Most learners first meet うち（内）／そと（外） as a keigo rule: elevate the out-group, humble your own in-group. That rule is real, and the verb-by-verb mechanics of it — which honorific fires for whom — are drilled on the keigo うち／そと page. This page is about the bigger thing that rule is a symptom of. うち／そと is the master frame from which Japanese computes a whole cluster of choices English never grammaticalizes: which noun you use for your own relatives versus other people's, which giving-and-receiving verb is even permitted, and how far you must lower yourself and your possessions. Politeness in Japanese is not a property attached to a person; it is relational, and うち／そと is the relation.
The principle, in one line
Draw a circle around yourself and whoever you belong with — your family, your company, your team. Inside is うち ("my side"); outside is そと ("the other side"). Then, across the whole language:
- Your own side is presented plainly or lowered.
- The other side is dressed up and raised.
The keigo axis is just the most famous consequence. Watch the same principle drive three things keigo textbooks rarely connect: the nouns for people, the direction of benefit verbs, and the modesty of self-presentation.
Naming: your side gets plain words, their side gets dressed-up ones
Japanese has two parallel vocabularies for family, and the うち／そと line chooses between them. For your own relatives (うち) you use bare, humble nouns; for someone else's (そと) you use honorific ones. English has nothing like this — "my mother" and "your mother" use the identical word mother.
| Relation | Your own (うち) | Someone else's (そと) |
|---|---|---|
| father | 父（ちち） | お父さん |
| mother | 母（はは） | お母さん |
| wife | 妻（つま）／ 家内（かない） | 奥さん |
| older brother | 兄（あに） | お兄さん |
| company | 弊社（へいしゃ） | 御社（おんしゃ） |
| house / home | うち | お宅（おたく） |
父はただいま外出しております。
chichi wa tadaima gaishutsu shite orimasu
My father is out at the moment. (own father → bare 父)
お父さんによろしくお伝えください。
o-tōsan ni yoroshiku o-tsutae kudasai
Please give my regards to your father. (someone else's → お父さん)
The same human being — a father — is 父 when he's yours and お父さん when he's theirs. You aren't looking up his rank; you're locating which side of your circle he stands on. (One familiar wrinkle: children address their own parents as お父さん／お母さん to their faces — that's a vocative, not talking about them to an outsider, where 父／母 is required.)
Benefit direction runs on the same line
The giving-and-receiving verbs — the あげる／くれる／もらう system — are usually taught as pointing "toward me" or "away from me." The sharper truth is that they point toward or away from the whole うち circle, not just the pronoun 私. This is why くれる is licensed for a gift to your little brother even though you received nothing:
先生が弟に参考書をくれました。
sensei ga otōto ni sankōsho o kuremashita
The teacher gave my little brother a reference book. (くれる — my brother is うち)
隣の人が、うちの子にお菓子をくれた。
tonari no hito ga, uchi no ko ni o-kashi o kureta
The neighbour gave my kid some sweets. (くれる — my child is inside my circle)
Neither gift landed with you, yet くれる is correct, because the thing moved inward across the うち boundary. Flip the recipient to an outsider and くれる becomes impossible — you'd need あげる, because now the thing is moving out. The benefactive auxiliaries 〜てくれる／〜てあげる／〜てもらう inherit the identical logic: a kindness done to anyone in your circle is 〜てくれる. So the arrow the giving verbs draw isn't anchored at "me" — it's anchored at the in/out line, exactly like keigo.
Self-presentation: lower your own side
Because your whole circle is うち, the modesty reflex extends to everything of yours — your company, your work, your gifts, your skills. Presenting them plainly (or actively deflating them) is not false humility; it's the grammatically expected stance toward your own side.
弊社の担当者が、明日そちらへ伺います。
heisha no tantōsha ga, ashita sochira e ukagaimasu
Our representative will visit you tomorrow. (own company + humble 伺う)
つまらないものですが、どうぞ。
tsumaranai mono desu ga, dōzo
It's nothing much, but please — (handing over a gift)
下手ですが、少しピアノを弾きます。
heta desu ga, sukoshi piano o hikimasu
I'm not very good, but I play a little piano.
つまらないものですが ("this is a trifling thing, but…") literally disparages your own gift as you present it — unthinkable in English, natural in Japanese, because the gift is yours and yours is うち. The same reflex makes you call your own company 弊社 (the "humble/unworthy company") while the client's is 御社 (the "honourable company"). You are not being insincere; you are placing your side where the grammar says it goes.
The boundary moves — and everything attached to it moves too
The single hardest idea: うち is not a fixed circle. It is redrawn for every conversation, at whichever ring separates you from your current listener — and when it moves, the reference nouns, the benefactive verbs, and the keigo all recompute together. To a client, your whole company is うち, so your boss becomes bare 田中:
田中はただいま席を外しております。
Tanaka wa tadaima seki o hazushite orimasu
Tanaka is away from his desk right now. (to a client — your boss is now うち, so no title, humble verb)
But step inside that same company and talk to a colleague from another department about your own team, and the ring tightens: now your section is うち and the other department is relatively そと. The boss you just humbled to the client gets elevated again to the colleague. Nothing about the boss changed — only where the line fell. This real-time recomputation is why business keigo feels like a maze until you stop memorizing exceptions and start asking, every time, "where does the in/out line fall right now?" The specific in-house-to-client drill lives on the keigo pages; the point here is that reference words and benefactive direction ride along with it. It also connects to your 立場 (standpoint): the boundary moves because your standpoint relative to the listener moves.
Common mistakes
Dressing up your own family to an outsider. English speakers reach for お父さん because it feels respectful; about your own father to someone else, it wrongly elevates your side.
❌ お父さんは、今、家にいません。（外の人に自分の父の話をして）
Wrong to an outsider — お父さん elevates your own father, who is うち. Use bare 父.
✅ 父は、今、家におりません。
chichi wa, ima, ie ni orimasen
My father isn't home right now.
Elevating your own company to a client. The reflex "be extra polite about my employer" inverts the system.
❌ うちの社長がいらっしゃいます。（お客様に）
Serious error — いらっしゃる elevates your own president, who is うち to a client. Humble him: 参ります／伺います.
✅ 弊社の社長が伺います。
heisha no shachō ga ukagaimasu
Our president will come. (own side humbled)
Using あげる when the benefit crossed into your circle. A kindness to your brother or child is inbound — くれる, not あげる.
❌ 先生が弟に本をあげた。
Wrong direction — the book moved inward, to your うち (your brother), so it must be くれる, not あげる.
✅ 先生が弟に本をくれた。
sensei ga otōto ni hon o kureta
The teacher gave my little brother a book.
Over-elevating your own gift or skill. Praising what's yours ("my wonderful present") clashes with the modesty the うち frame requires.
❌ 素晴らしいプレゼントを持ってきました。どうぞ。
Boastful — praising your own gift breaks the self-lowering norm for your own side. Deflate it instead.
✅ つまらないものですが、どうぞお受け取りください。
tsumaranai mono desu ga, dōzo o-uketori kudasai
It's just a little something, but please accept it.
Key takeaways
- うち／そと is a whole-language principle, not only a keigo rule: it also chooses your reference nouns (父 vs お父さん, 弊社 vs 御社), licenses benefactive direction, and governs self-presentation.
- Family and company come in two vocabularies — plain/humble for your own side, honorific for the other side.
- くれる and 〜てくれる track the うち boundary, not the pronoun 私 — a gift to your brother or child is still inbound.
- Your whole side is lowered: 弊社, つまらないものですが, 下手ですが are expected modesty, not false humility.
- The boundary is redrawn every conversation, and reference words, benefactives, and keigo all recompute together — always ask where the in/out line falls now.
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- 立場: Speaking from Your Social PositionN2 — Japanese has no neutral 'treat everyone the same' setting — before you speak you locate your 立場 (standpoint) relative to the listener, and that position anchors your viewpoint, your verbs, your requests, and how blunt you're allowed to be.
- Honorific Distance & Psychological DistanceN2 — Keigo is a dial of interpersonal distance, not just a meter of respect — です・ます opens a measured gap and plain form closes it, which is why sudden politeness between intimates reads as cold and dropping into plain speech signals closeness.
- でございます / ございます: The Polite CopulaN3 — The ultra-polite copula でございます and the elevated verb of existence ございます — the hallmark language of shops, hotels, and formal announcements.
- うち／そと: In-Group and Out-GroupN3 — The 内／外 boundary silently decides which keigo axis fires — you elevate out-group people and humble your own in-group, even when that in-group member is your own boss.