LESSON NOTES · レッスンノート

N4Talking to real people · Sep 20, 2026

難むずかしい and 大変たいへん: "difficult" and "tough" are not the same complaint

難むずかしい means something is hard to do *correctly* — a skill problem. 大変たいへん means something is hard to *get through* — a burden problem. A task can be one, the other, both, or neither, and choosing wrong changes what you are complaining about.

English blurs this with "hard", which covers both. Japanese keeps them apart, and the split shows up constantly: in lessons, at work, and in the sympathy people offer each other. Once you have it, a whole row of related words — ややこしい, 面倒めんどうくさい, きつい — slots in around it.

The basics

難むずかしい — hard to do right

A question of skill, understanding or precision. It says the thing requires ability you may not have.

日本語にほんごの敬語けいごは難むずかしいです。 — Japanese honorific language is difficult. (polite) この問題もんだいは難むずかしかった。 — That question was hard. (casual)

It is an い-adjective: 難むずかしくない, 難むずかしかった, 難むずかしそう. The opposite is 簡単かんたん (かんたん), "easy, simple", which is a な-adjective — a mismatch worth noticing.

大変たいへん — hard to get through

A question of load. It says the thing takes a lot out of you, regardless of whether it requires skill.

引っ越ひっこしは大変たいへんでした。 — Moving house was a lot. (polite) 子育こそだては大変たいへんです。 — Raising children is hard work. (polite)

Moving boxes is not difficult — anyone can carry a box — but it is unquestionably 大変たいへん. That is the distinction in one example.

大変たいへん is also an adverb

Separately from the adjective, 大変たいへん means "very", in formal register.

大変たいへんありがとうございます。 — Thank you very much. (formal, business) 大変申たいへんもうし訳わけございません。 — I'm terribly sorry. (formal, apologising)

This is not a different word being confusing — it is the same word doing an intensifier's job, and it appears constantly in customer-facing Japanese.

Beyond the basics

大変たいへん as sympathy

On its own, 大変たいへんですね is a complete, standard response to someone describing a hard situation. It is one of the most useful two-word replies a learner can carry.

大変たいへんですね。 — That sounds rough. (polite — offering sympathy) それは大変たいへんでしたね。 — That must have been hard. (polite, past)

Replying 難むずかしいですね to someone's tough week would be strange — it would mean their week required more skill than they had. 大変たいへん is the sympathy word.

ややこしい — complicated, tangled

Not difficulty, but complexity. Something with too many parts that are easy to confuse.

手続てつづきがややこしい。 — The procedure is convoluted. (casual)

A form with fourteen boxes is ややこしい, not 難むずかしい. The distinction matters because ややこしい carries mild irritation — it implies the complexity is unnecessary.

面倒めんどうくさい — can't be bothered

The most-used word in this family, and the one textbooks avoid. It describes something as a hassle, and the complaint is about willingness rather than ability.

洗あらい物ものが面倒めんどうくさい。 — Washing up is such a hassle. (casual) 面倒めんどうくさい。 — Ugh, I can't be bothered. (casual — a complete sentence)

It shortens to めんどい in fast speech. Note that it is not polite to use about work someone has asked you to do, for the obvious reason.

きつい — physically or emotionally severe

Harsh, punishing, too much. It covers physical strain, harsh schedules and harsh words.

このスケジュールはきつい。 — This schedule is brutal. (casual)

きつい also means "tight" for clothing — この靴くつはきつい, "these shoes are too tight" — which is the same idea of pressure applied from outside.

The one that means "sorry, that's a no"

難むずかしい has a second life as a refusal. When a Japanese colleague says a proposal is 難むずかしい, they are usually not describing a technical obstacle.

それはちょっと難むずかしいですね。 — That would be difficult. (polite — in practice, "no")

This is a soft no, and hearing it as an invitation to solve the difficulty is a classic cross-cultural misfire. It belongs to the same family of indirect refusals as ちょっと trailing off, covered in how to say no in Japanese.

When "hard" attaches to a verb ("hard to read", "hard to say"), Japanese uses 〜にくい instead. See 〜やすい and 〜にくい.

Common mistakes

  • Using 難むずかしい for a heavy but simple task. Carrying boxes all day is 大変たいへん, not 難むずかしい.
  • Using 大変たいへん to describe a hard exam question. The question is 難むずかしい; the exam week might be 大変たいへん.
  • Replying 難むずかしいですね to someone's bad news. The sympathy word is 大変たいへんですね.
  • Treating 難むずかしい in a meeting as a technical problem. It is usually a polite refusal.
  • Using 面倒めんどうくさい about a task someone assigned you. It is honest and it is rude. 大変たいへん is the safe version.

The difficulty scale

Word What kind of hard Example
難むずかしい Hard to do correctly — skill 敬語けいごは難むずかしい
大変たいへん Hard to get through — burden 引っ越ひっこしは大変たいへん
ややこしい Complicated, easy to confuse 手続てつづきがややこしい
面倒めんどうくさい A hassle — willingness 洗あらい物ものが面倒めんどうくさい
きつい Severe, punishing スケジュールがきつい
簡単かんたん Easy この問題もんだいは簡単かんたん

FAQ

Which one do I use for learning Japanese? Both, for different parts. 漢字かんじは難むずかしい is about difficulty; 毎日まいにち勉強べんきょうするのは大変たいへん is about the grind.

Is 大変たいへん negative? As an adjective, yes — it describes something demanding. As an adverb it is neutral and formal, just meaning "very".

How do I say "that sounds tough" to a friend? 大変たいへんだね casually, 大変たいへんですね politely. Both are complete, natural replies.

Is 面倒めんどうくさい rude? It is casual and complaining. Fine with friends about your own chores, risky about anything someone has asked of you.

What is the difference between 難むずかしい and 複雑ふくざつ? 複雑ふくざつ (ふくざつ) means complex — many interacting parts. It is more neutral and technical than ややこしい, which adds irritation.

If a colleague says 難むずかしいですね, should I offer solutions? Usually not. Treat it as a polite no unless they follow it with an actual obstacle you could remove.

Practice

Build each answer before opening it. Questions 1 and 2 are a pair — the same English word, two different claims.

1. Describe honorific language as difficult.

Show answer

敬語けいごは難むずかしいです — a skill problem. This is the pair to question 2.

2. Describe moving house as hard.

Show answer

引っ越ひっこしは大変たいへんでした — a burden problem, not a skill problem. This is the pair to question 1.

3. A friend describes a terrible week. Reply with sympathy.

Show answer

大変たいへんだね(polite: 大変たいへんですね)— 難むずかしいですね would say their week required skill they lacked.

4. Say "the procedure is convoluted."

Show answer

手続てつづきがややこしい — too many confusable parts, with a note of irritation.

5. Say "washing up is such a hassle," casually.

Show answer

洗あらい物ものが面倒めんどうくさい — about willingness, not ability.

6. Say "this schedule is brutal."

Show answer

このスケジュールはきつい — きつい is severity, and it also means "tight" for clothes.

7. Thank a customer very formally.

Show answer

大変たいへんありがとうございます — here 大変たいへん is an adverb meaning "very".

8. A colleague says それはちょっと難むずかしいですね. What did they mean?

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No — it is a polite refusal, not a request for help solving a problem.

9. What is the opposite of 難むずかしい?

Show answer

簡単かんたん(かんたん) — note it is a な-adjective while 難むずかしい is an い-adjective.

10. Something is wrong here: 箱はこを一日いちにち運はこんで、難むずかしかった。

Show answer

箱はこを一日いちにち運はこんで、大変たいへんだった — carrying boxes takes no skill. It is a burden, so 大変たいへん.

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.

難しい	むずかしい — difficult (skill)
大変	たいへん — tough, demanding; very
簡単	かんたん — easy, simple
ややこしい	ややこしい — convoluted, confusing
面倒くさい	めんどうくさい — a hassle, bothersome
きつい	きつい — severe, harsh; tight
複雑	ふくざつ — complex
敬語	けいご — honorific language
引っ越し	ひっこし — moving house
手続き	てつづき — procedure, paperwork
子育て	こそだて — raising children
問題	もんだい — problem, question
洗い物	あらいもの — washing up
運ぶ	はこぶ — to carry
箱	はこ — box
靴	くつ — shoes

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. 大変たいへんですね is the reply I most want students to have ready — it is two words, it is always appropriate, and it is what a Japanese conversation expects when someone has just told you something hard.

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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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