の vs こと: A Three-Test Rule for Japanese Nominalizers

KOTOBA BREW

第035号 · Issue 035

See It, Hear It, Say の

{{first_name | みんな}}さん、こんにちは ☕

There is a moment, somewhere around N4, when you work out that "の is concrete, こと is abstract" is a description and not an instruction. 👀

It tells you what the two words mean. It has never once moved your hand.

So here is the thing that moves your hand. Three questions, asked in order. Stop at the first yes.

Know someone who stalls at that exact spot in the sentence? Send them this. Share this issue →

Three torii gateway forms receding, the nearest one standing open

Question one: is the verb catching it as it happens?

If your eyes, ears or hands are on the event while it is unfolding, you want の.

→ 見（み）る・見える・聞（き）く・聞こえる

→ 待（ま）つ・手伝（てつだ）う・止（と）める・邪魔（じゃま）する

彼（かれ）が走（はし）るのを見た。You watched the running happen. の. 💡

Now the part that matters more than the list, because this is where the usual version of this rule quietly breaks.

一言	☝️ Chotto ちょっと The test looks at the outer verb only. 富士山（ふじさん）を見たことがありますか has 見る sitting right there in plain view, and the answer is still こと, because the outer frame is 〜たことがある. The seeing is inside the box, not holding it.

And "as it unfolds" is not "in front of you". テニスコートが乾（かわ）くのを部屋（へや）で待った is perfectly good の from another room entirely. You are pinned to the event finishing, not standing next to it. 🎯

A small box nested inside a larger box, clearly contained

One more: if what reached you was news rather than sound, question one does not fire. 彼が退職（たいしょく）したことを聞いて驚（おどろ）いた. You did not hear him resign. You heard about it. こと. 👀

Question two: is the slot already locked?

Three kinds of lock. Any one of them and the answer is こと.

→ It sits before です as the thing you are equating. 私（わたし）の夢（ゆめ）は日本で働（はたら）くことです。

→ It is a frozen frame. ことができる · 〜たことがある · ことにする · ことになる。Learn these four as vocabulary, not as grammar.

→ The outer verb moves information or makes a commitment. 話（はな）す · 伝（つた）える · 約束（やくそく）する · 決（き）める。

A caution on the first one, because the short version of this rule is too broad. の cannot be the B in an A は B だ equation. It can absolutely turn up before です doing other jobs: 赤（あか）いのです is fine, and so is the explanatory のです. 📌

Question three: neither fired, so you are free

の in conversation, こと in writing. Genuinely stuck with nothing to go on? Say の. You will be right more often than not. 💪

危険	⚠️ Abunai 危（あぶ）ない Two places where "free" is a lie.

Clefts. If the shape is 〜のは plus a place, a time or a person, plus だ, then の is compulsory even in writing. 生（う）まれたのは京都（きょうと）だ。Swap in こと and it is simply wrong.

忘（わす）れる and 思（おも）い出（だ）す. Here your choice is not register, it is meaning. 鍵（かぎ）をかけるのを忘れた is I forgot to lock it. 行（い）ったことを忘れた is I forgot that I went. Two different sentences. Pick by what you mean, not by how formal you feel. 😅

Why nobody handed you this earlier. Minna no Nihongo teaches 〜ことができます in Lesson 18, and does not introduce の as a nominalizer until Lesson 38. Twenty lessons apart. The teachers' manual for Lesson 38 even warns instructors to be ready for the question. So the curriculum knows the collision is coming, schedules it two years downstream, and hands your teacher the cleanup. It was never your fault for finding it murky. 📚

An empty roadside bench with long afternoon shadows

This Week's Japanese

Word of the Week

期待（きたい）Neutral, everyday

Means: expectation, or looking forward to something. Far more common in daily Japanese than "expectation" sounds in English. 🍵

Use it: 期待しています。あまり期待しないで。期待以上（いじょう）でした。

Kanji of the Week · 漢字

待

Meaning: to wait.

Reading to learn first: ま（つ）. On'yomi is タイ, which is the one you meet in compounds.

Common words: 期待 expectation · 招待（しょうたい） invitation · 待合室（まちあいしつ） waiting room

Memory hint: the left side is the "going" radical, the right is 寺（てら）. Movement held in place. That is waiting. ⚡

This week's connection: 待つ is question one's cleanest verb. バスが来（く）るのを待った. You are not watching an idea of a bus. You are pinned to an arrival that has not happened yet, and that pinning is exactly what の marks.

Renshuu Time 練習（れんしゅう） 📝

Ten sentences. Write の or こと, and write the number of the question that fired.

Score yourself on the number, not the word. Getting the right word by feel and the wrong number means the rule has not landed yet, and feel deserts you the moment a sentence gets long.

→ Starter, questions 1 to 4. 隣（となり）の部屋で誰（だれ）かが泣（な）いている＿が聞こえた。／子（こ）どもが道（みち）を渡（わた）る＿を見ていた。／バスが来る＿を三十分（さんじゅっぷん）も待った。／母（はは）が夕（ゆう）ごはんを作（つく）る＿を手伝った。

→ Standard, 5 to 8. 私の夢は日本で働く＿です。／兄（あに）は中国語（ちゅうごくご）を話す＿ができる。／富士山を見た＿がありますか。／彼が会社（かいしゃ）を辞（や）めた＿を聞いて驚いた。

→ Challenge, 9 and 10. 毎朝（まいあさ）走る＿にしました。／漢字（かんじ）を覚（おぼ）える＿は難（むずか）しい。

Answers next issue. Two of these are traps, and if you get them by feel you will not notice you were trapped.

✨ Yatta やった

You now have something the nuance explanation could never give you: an order of operations. Not a feeling about which word is more abstract, but a first question, a second question, and a default. 🙌

The tiny win

Ten minutes, and the stall in the middle of your sentence has a procedure attached to it now. That is worth more than knowing what both words mean, which you already did. 💪

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