LESSON NOTES · レッスンノート

N5Grammar, one piece at a time · Sep 17, 2026

How to say "a lot" in Japanese: たくさん, いっぱい — and the one that cannot touch a noun

たくさん and いっぱい both mean "a lot" and both go before the verb. おおい also means "a lot," but it is an adjective that cannot sit in front of a noun: おおひと is wrong, and ひとおおい is right. That restriction catches every learner at least once, because English has no equivalent of it.

Quantity is one of the first things you want to express and one of the first places Japanese refuses to behave like English. The words are easy; the rule about where おおい can stand is the part worth five minutes.

The basics

たくさん: the standard "a lot"

たくさんべました。 — I ate a lot. (polite) ほんがたくさんあります。 — There are a lot of books. (polite)

たくさん is an adverb, so it goes before the verb. To attach it to a noun directly, you need の: たくさんのほん ("a lot of books"). Both たくさんのほんがあります and ほんがたくさんあります are correct, and the second is more common in speech.

いっぱい: the same, but warmer

いっぱい means the same thing and sounds more casual and more physical — it comes from 一杯いっぱい, "one cupful."

今日きょうはいっぱいあるきました。 — I walked a lot today. (casual-polite) はらいっぱいです。 — I'm full. (polite — the set phrase, literally "stomach full")

はらいっぱいです is the phrase to have ready after a meal in Japan, and it is a compliment rather than a complaint.

おおい: the adjective that cannot go in front

Here is the rule that matters.

ひとおおいです。 — There are a lot of people. (polite — correct) おおひとがいます。(wrong as "many people" — this reads as "a person who is many")

おおい describes a quantity as a state, so it works as a predicate at the end of a sentence but not as a modifier before a noun. If you need to modify a noun, you have three options:

  • ひとおおみせ — a shop where the people are many (relative clause)
  • たくさんのひと — a lot of people (たくさん + の)
  • おおくのひと — many people (the special form おおく + の)

おおくの is the one to memorize, because it is the fix for exactly this situation and it is very common in writing.

Beyond the basics

すくない has the same restriction

The opposite of おおい behaves identically.

きゃくさんがすくないです。 — There are few customers. (polite — correct) すくないひと(does not mean "few people")

The pattern to remember: おおい and すくない are about how many there are, not about which ones. Adjectives that describe quantity in Japanese live at the end of the sentence. たかい, あたらしい and おおきい have no such restriction — たかほん is perfectly fine — which is why this feels arbitrary until you see that it is specifically the quantity adjectives.

とても, すごく, かなり: degree, not quantity

These modify how much, not how many, and they attach to adjectives rather than counting things.

とてもたかいです。 — It's very expensive. (polite, neutral) すごくたかいです。 — It's really expensive. (casual-polite, more emphatic) かなりたかいです。 — It's fairly expensive. (polite — less than すごく, more than a little)

とても is the neutral default and the one to use in writing. すごく is spoken and more emotional. かなり sits between "fairly" and "quite" and is useful precisely because it is honest about being a middling amount.

The small end: すこし, ちょっと, すこしだけ

すこはなせます。 — I can speak a little. (polite, neutral) ちょっとってください。 — Please wait a moment. (polite — the most-used word in Japanese)

すこし and ちょっと mean the same thing; すこし is slightly more formal. ちょっと also does an enormous amount of social work as a softener — ちょっとたかいですね ("it's a bit expensive") and ちょっと… as a refusal are both ちょっと doing something other than measuring quantity.

Counting instead of quantifying

Often the natural Japanese is a number and a counter rather than a quantity word.

ほん三冊さんさついました。 — I bought three books. (polite)

Japanese reaches for exact counts more readily than English does, and the counter goes after the noun with no particle. If counters are still shaky, the six you actually need is the short version.

ばかり and だらけ: too much of one thing

Two words that mean "a lot" with an attitude attached.

  • 〜ばかり — nothing but, only this
  • 〜だらけ — covered in, full of (almost always negative)

漫画まんがばかりんでいます。 — I do nothing but read manga. (casual-polite, mild self-criticism) 間違まちがいだらけです。 — It's full of mistakes. (polite — definitely negative)

だらけ is strongly negative and attaches directly to a noun: どろだらけ (covered in mud), きずだらけ (covered in scratches). ばかり has its own set of uses, covered in 〜ばかり.

Common mistakes

  • Putting おおい in front of a noun. おおひと is not "many people." Use おおくのひと or restructure as ひとおおい.
  • Putting すくない in front of a noun. Same rule. Use すこしの or restructure.
  • Forgetting the の after たくさん. たくさんほん is not standard; it is たくさんほん, or move it to たくさんあります.
  • Using とても with a verb. とてもべました is odd. For verbs you want たくさんべました.
  • Treating いっぱい as always casual.はらいっぱいです is perfectly polite. The word is casual in register, not impolite.
  • Using だらけ for something positive. はなだらけ sounds like an infestation. For a pleasant abundance, use いっぱい.

The quantity toolkit

What you mean Word Where it goes
A lot (with a verb) たくさん / いっぱい Before the verb
A lot of + noun たくさんの / おおくの Before the noun
There are many おお End of the sentence
There are few すくない End of the sentence
Very (with an adjective) とても / すごく / かなり Before the adjective
A little すこし / ちょっと Before the verb or adjective
An exact amount number + counter After the noun
Nothing but 〜ばかり After the noun or te-form
Covered in (negative) 〜だらけ After the noun

Practice

Questions 1 and 2 are the pair: the same meaning, and only one word order works.

1. Say "there are a lot of people," politely.

Show answer

ひとおおいです。おおい goes at the end. It describes the quantity as a state.

2. Now say "many people" as a noun phrase, inside a longer sentence.

Show answer

おおくのひとおおい cannot modify a noun directly, so the special form おおく plus の does the job. たくさんのひと also works.

3. Say "I ate a lot," politely.

Show answer

たくさんべました。 — たくさん is an adverb, so it goes before the verb with no particle.

4. Say "I'm full" after a meal.

Show answer

はらいっぱいです。 — A set phrase, and a compliment rather than a complaint.

5. Say "it's very expensive," neutrally and politely.

Show answer

とてもたかいです。 — とても for degree with an adjective. すごく would be more emotional and more spoken.

6. Say "I can speak a little," politely.

Show answer

すこはなせます。 — ちょっとはなせます also works and sounds slightly more casual.

7. Say "I bought three books."

Show answer

ほん三冊さんさついました。 — The counter goes after the noun and its particle, with nothing in between.

8. Say "it's full of mistakes," politely.

Show answer

間違まちがいだらけです。 — だらけ attaches straight to the noun and is always negative.

9. Fix this: おおひとがいます。(meaning "there are many people")

Show answer

ひとおおいです。 — Or おおくのひとがいます. おおい cannot stand in front of a noun.

10. Fix this: とてもべました。

Show answer

たくさんべました。 — とても modifies adjectives. For "a lot" with a verb you need たくさん or いっぱい.

FAQ

Why can たかい go in front of a noun but おおい cannot? Because おおい describes the size of a set rather than a property of an individual. たかほん picks out a book that is expensive; おおほん would have to pick out a book that is numerous, which is not a thing a single book can be.

Is おおくの only for writing? It leans written and formal, but it is perfectly usable in speech. In casual conversation たくさんの or a restructured 〜がおおい is more common.

What is the difference between たくさん and いっぱい? Meaning, none. Register: いっぱい is warmer and more casual, with a physical "filled up" feeling. たくさん is the neutral default and safer in writing.

Can I say とてもたくさん? Yes, though it is emphatic and slightly heavy. すごくたくさん is the more natural spoken version of the same idea.

Is ちょっと ever not about quantity? Constantly. ちょっとって ("hang on"), ちょっといいですか ("got a second?") and a trailing ちょっと… as a soft refusal are all social moves rather than measurements.

How do I say "too much"? 〜すぎる attached to the verb or adjective stem: べすぎました ("I ate too much"), たかすぎます ("it's too expensive"). See 〜すぎる for the い you have to drop.

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.

たくさん	たくさん — a lot
いっぱい	いっぱい — a lot, full
多い	おおい — many, numerous
多く	おおく — many (before の)
少ない	すくない — few
少し	すこし — a little
ちょっと	ちょっと — a little, a moment
とても	とても — very
すごく	すごく — really
かなり	かなり — fairly, quite
だらけ	だらけ — covered in (negative)
お腹	おなか — stomach
冊	さつ — counter for books
間違い	まちがい — mistake
泥	どろ — mud
漫画	まんが — manga
お客さん	おきゃくさん — customer, guest
歩く	あるく — to walk

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. おおひと is a mistake almost everyone makes exactly once, usually while trying to describe a crowded train — and the fix, ひとおおい, is a sentence you then use every day.

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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 · N5

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