LESSON NOTES · レッスンノート

N4Lesson notes · Sep 18, 2026

ただ: "free," "merely," and "but" — three words sharing one sound

ただ is three different words. At the front of a sentence it means "but." In front of a noun it means "merely, nothing more than." On its own after です it means "free of charge." Position tells you which one you are hearing.

Learners usually meet the "free" one first, from a sign or a game, and then spend months confused when characters start sentences with ただ. They are not the same word, and no amount of thinking about "free" will get you to "however."

The basics

ただ = free of charge

This is the one everybody learns first. In this meaning it is often written in katakana — タダ — precisely to separate it from the other two.

このアプリはただです。 — This app is free. (polite) 入場にゅうじょうはタダだった。 — Entry was free. (casual)

The neutral word is 無料むりょう (むりょう), and that is what appears on signs, websites and anything official. ただ is the spoken, slightly blunter version.

Word Register Where you see it
無料むりょう Neutral, written Signs, websites, forms, announcements
ただ / タダ Casual speech Conversation, manga, adverts aimed at you
無償むしょう (むしょう) Formal, written Contracts, "free of charge" in a legal sense
サービス Casual, in shops "On the house" — a Japanese use of the English word

That last one is worth knowing: a restaurant saying これはサービスです means "this one's on us," not "this is our service."

ただ = merely, nothing more than

Put it in front of a noun with の, and it means the thing is ordinary — and usually the speaker is pushing back on someone who thinks otherwise.

ただの風邪かぜです。 — It's just a cold. (polite) ただの友達ともだちだよ。 — We're just friends. (casual)

The tone is always mild denial. ただの〜 is the word you reach for when someone has read too much into something.

Without の it attaches to numbers and counters for emphasis:

ただ一人ひとりだけのこった。 — Only one person remained. (written/literary)

This second meaning is close to だけ and しか, but ただ is heavier and more dramatic. だけ is how you say "only" in conversation; ただ一人ひとり is how a narrator says it.

ただ = but, however

At the start of a sentence, ただ is a soft "but." It adds a caveat to something you have just agreed with.

いいとおもいます。ただ、時間じかんがかかりますね。 — I think it's good. It's just that it'll take time. (polite) きたい。ただ、おきんがない。 — I want to go. Only, I have no money. (casual)

The feel is closer to English "only," "just," or "the thing is" than to a hard "but." It softens rather than contradicts, which is why it turns up so much in polite disagreement.

Beyond the basics

ただし is the rule-book version

ただし (ただし) is the formal relative of the third meaning, and it means "provided that." It appears in rules, terms and signs — essentially anywhere conditions are attached.

入場無料にゅうじょうむりょう。ただし、小学生以下しょうがくせいいか保護者ほごしゃ同伴どうはん — Admission free. However, children of primary school age and under must be accompanied by a guardian. (written)

If you ever read the small print on a Japanese poster, ただし is the word introducing the catch.

ただいま is a different word wearing the same clothes

ただいま is 只今ただいま — "just now, at this moment." The homecoming greeting is a shortening of ただいまかえりました ("I have returned just now"), which is why it means "I'm home" without containing any word for "home."

You also hear the full version constantly in shops and on the phone:

ただいま準備中じゅんびちゅうです。 — We are preparing right now. (polite) ただいませきはずしております。 — They are away from their desk at the moment. (humble)

So if you hear ただいま from a member of staff, nobody has come home. This is the same kind of split covered in Japanese homophones, except here the words are genuinely related and drifted apart.

The compounds that mean "for free"

  • ただはたらき (ただばたらき) — working without pay
  • ただり (ただのり) — riding without paying; also "free-riding" in the social sense
  • ただ (ただみ) — watching without paying

All three carry a faint disapproval. They are not neutral descriptions of a free service — they describe getting something you should have paid for.

タダよりたかいものはない

A proverb you will meet: タダよりたかいものはない — "there is nothing more expensive than something free." It is the Japanese "there's no such thing as a free lunch," and it turns up in conversation whenever someone is offered a suspiciously good deal. The たかい here is the price meaning, which the たかい article untangles from the height meaning.

ただでさえ

ただでさえ means "even as it is, even without that." It sets up a complaint about something being made worse.

ただでさえいそがしいのに、仕事しごとえた。 — I was already busy as it is, and now there's more work. (casual)

The のに at the end is doing its usual job of carrying the grievance.

How it sounds in anime

Three things worth listening for.

First, ただの〜じゃない — "this isn't just a ___" — is a stock line before a reveal. ただの人間にんげんじゃない. It is almost a genre marker.

Second, characters use sentence-initial ただ constantly to half-agree, and subtitles usually render it as "but," which flattens it. What is actually happening is a softer hedge: the speaker is conceding the point and adding a problem.

Third, ただ一人ひとり and ただひとつ in narration are register markers. When a narrator says ただ一人ひとり生き残いきのこった, the ただ is doing emotional work that だけ would not do.

Common mistakes

  • Saying ただですか? to a shop assistant. It reads as blunt, close to "is this a freebie?" Ask 無料むりょうですか. Use ただ for things, not to people's faces.
  • Using ただ to mean "but" in writing. In formal writing you want しかし or ただし. Sentence-initial ただ is conversational.
  • ただの before a verb. ただの attaches to nouns only — ただの学生がくせい. In front of a verb you want ただ〜だけ.
  • Reading ただいま as only the greeting. In a shop or on the phone it means "right now," and the sentence continues.
  • Assuming タダ in katakana is slang. The katakana is just visual separation from the other two meanings. It is not youth language.
  • Confusing ただ with たた・だだ. Both syllables are short. Lengthening either makes a different word or no word at all.

FAQ

Is ただ rude? The word itself is not. Using it about a price, to the person selling you the thing, is what sounds blunt. 無料むりょう is the safe choice in any exchange with staff.

Why is ただ sometimes written タダ? To disambiguate. Japanese has no spaces and few capital letters, so katakana is often used to signal "this one, the free one." You will see the same trick with ダメ and スゴい.

Is ただし the same word as ただ? Historically yes, in the "but" sense. In practice treat them as separate: ただ is conversational, ただし is the written form used in rules and conditions.

What is the difference between ただの and たんなる (たんなる)? They overlap. たんなる is stiffer and more written; ただの is what you say out loud. たんなるミス and ただのミス both mean "just a mistake."

Does ただ ever mean "always"? No. You may be thinking of いつも. The confusion usually comes from ただただ, a reduplicated adverb meaning "simply, utterly" — ただただおどろいた, "I was simply astonished."

Practice

Questions 1 and 2 are a pair: the same word, two completely different meanings, told apart only by position.

1. Say "This app is free," politely.

Show answer

このアプリはただです。 — or 無料むりょうです. After は〜です, ただ is the price meaning. 無料むりょう is the safer choice when talking to staff.

2. Say "I think it's good. It's just that it'll take time," politely.

Show answer

いいとおもいます。ただ、時間じかんがかかりますね。 — at the front of a sentence, ただ is the soft "but." Position is the only thing distinguishing it from question 1.

3. Someone assumes your cough is serious. Tell them it's just a cold, politely.

Show answer

ただの風邪かぜです。 — ただの+noun means "nothing more than." The tone is mild denial, which fits exactly here.

4. Fix this: ただ学生がくせいです。 (intended: "I'm just a student")

Show answer

ただの学生がくせいです。 — the の is required when ただ attaches to a noun. Without it the sentence reads as an unfinished "but."

5. A sign says 入場無料にゅうじょうむりょう。ただし、小学生以下しょうがくせいいか保護者ほごしゃ同伴どうはん。 What is ただし doing?

Show answer

Introducing a condition — "provided that." ただし is the written, rule-book form. Entry is free, but only with a guardian for younger children.

6. A shop assistant says ただいま準備中じゅんびちゅうです。 Has someone come home?

Show answer

No. ただいま here means "right now." 只今ただいま is "at this moment." The homecoming greeting is a shortening of ただいまかえりました.

7. What does ただはたらき mean, and what is the feeling attached to it?

Show answer

Working without pay — and it is a complaint. ただはたらき・ただり・ただ all imply getting something you should have paid for.

8. Translate the proverb タダよりたかいものはない.

Show answer

"There is nothing more expensive than something free." The Japanese equivalent of "there's no such thing as a free lunch." たかい here is price, not height.

9. Say "I was already busy as it is, and now there's more work," casually.

Show answer

ただでさえいそがしいのに、仕事しごとえた。 — ただでさえ sets up "even without this," and のに carries the grievance.

10. You want to write "but" at the start of a sentence in a formal report. Is ただ the right choice?

Show answer

No — use しかし, or ただし if you are attaching a condition. Sentence-initial ただ is conversational and looks light in formal writing.

Vocabulary from this article

Tap the block to select all of it, then copy. In Anki: File → Import, note type Basic, separator Tab — the first column becomes the front, the second the back.

ただ	ただ — free; merely; but
無料	むりょう — free of charge (neutral, written)
無償	むしょう — free of charge (formal, legal)
ただし	ただし — however, provided that
只今	ただいま — right now; I'm home
ただ働き	ただばたらき — working without pay
ただ乗り	ただのり — riding without paying, free-riding
単なる	たんなる — mere, simple (written)
風邪	かぜ — a cold
入場	にゅうじょう — entry, admission
保護者	ほごしゃ — guardian
同伴	どうはん — accompaniment
準備中	じゅんびちゅう — preparing, not yet open
席を外す	せきをはずす — to be away from one's desk
増える	ふえる — to increase
驚く	おどろく — to be surprised

I'm Yuuki, a Japanese teacher based in Tokyo. I've taught on italki as a Top 1% teacher and watched over 1,500 anime. Students almost always arrive with only the "free" meaning, and the sentence-initial ただ is what trips them up in real conversation — so that is the one worth drilling.

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Sources: the author's own lessons and standard reference grammars.

More drills like the ones above, plus a timed JLPT-style mock test: Practice · N4

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