The Particle “mo”: Also, Likewise, Emphasis, Total Negation [JLPT N5]
Content by NTJ Kuma · Nihongo to Japan editorial team · Updated July 27, 2026
「私も行く」「何もない」 — the same “too,” a sweeping “none at all,” and emphatic “as much as.”
「も」 is the sentence's invisible magnifier
「も」 looks like a tiny “too/also,” but it's really the sentence's invisible magnifier: swap 「が」 for 「も」 and 「私が行く」 instantly becomes 「私も行く」 (I'll go too), changing the whole scope. も has three uses — ① also/too ② question word ＋ も ＋ negative = total negation ③ number ＋ も = emphasis (as many as) — plus advanced points like 「〜も〜も」 and particle-stacking (にも／でも). All sorted here, with plenty of examples and practice.
Core: も “adds to the same set,” or pushes the scope to an extreme
The soul of も is “adding, covering” — folding something into “the same category,” or pushing the range to “all／an unexpected degree”:
- ① Also/too (adding the same case): 私も行く (I'll go too), これもください (this one too, please).
- ② Question word ＋ も ＋ negative = total negation: 何もない (nothing at all), 誰も来ない (no one comes), どこにも行かない (go nowhere).
- ③ Number ＋ も = emphasis “as many as, no less than”: 三時間も待った (waited as long as three hours), 五回も読んだ (read it five whole times).
Anchor: when も appears, it's saying “this counts in too／all of them／more than you'd expect” — it widens or emphasizes the scope covered.
The three uses at a glance
| Use | Form | Example |
|---|---|---|
| ① also/too | nounも | 私も行く |
| ② total negation | question wordも＋negative | 何もない |
| ③ number emphasis | quantityも | 三時間も待った （waited a whole three hours） |
Examples in context
- A：私は納豆が嫌いです。B：私も嫌いです。(A: I hate natto. B: I hate it too.) — ① also
- 日本にもアメリカにも行った。(I've been to both Japan and the US.) — ① 〜も〜も (both)
- 昨日は何も食べませんでした。(I ate nothing yesterday.) — ② total negation
- 教室には誰もいない。(There's no one in the classroom.) — ② total negation
- レポートを書くのに、十時間もかかった。(Writing the report took as long as ten hours.) — ③ number emphasis
- 一円もない。(I don't have a single yen.) — ②③ combined (smallest unit ＋ negation)
⚠️ The classic trap: も with negatives vs でも with affirmatives
① “Question word ＋ も ＋ negative” = total negation; “question word ＋ でも” = total affirmation: 何もない (nothing) vs 何でもいい (anything's fine); 誰も来ない (no one comes) vs 誰でもできる (anyone can). Opposite directions — don't confuse: も ＋ negative = zero; でも = all OK.
② も replaces は／が／を, but “stacks” onto に／で／と／へ: subject/object は/が/を become も directly (私が→私も, パンを→パンも); but location/target に/で/と keep the particle and add も — 「にも・でも・とも・へも」: 日本にも行く (go to Japan too), ここでも買える (can buy it here too). ✗「日本も行く」 (would read oddly, as if “Japan the thing also goes”).
③ Number ＋ も “as many as” vs number ＋ しか〜ない “only”: 三個もある (as many as three — feels like a lot) vs 三個しかない (only three — feels like few). Same “three,” but も = “surprisingly many,” しか〜ない = “regrettably few” — opposite speaker judgments.
🔄 Compare: も／は／でも
| Form | Feel | Example |
|---|---|---|
| も | also/too (adding the same) | 私も行く |
| は | topic, contrast (often implies the opposite) | 私は行く |
| でも | question word ＋ でも = all-affirmative; noun ＋ でも = even | 何でもいい／子供でも |
Going deeper: 〜も〜も, smallest-unit ＋ も, and 「ても」
One level down, these high-frequency expressions are all も:
- 「〜も〜も」 = both (affirmative)／neither (negative): affirmative → 肉も魚も食べる (eat both meat and fish); negative → 肉も魚も食べない (eat neither). Listing two under one coverage.
- Smallest unit ＋ も ＋ negative = not even one: 一円もない (not a single yen), 一人も来ない (not one person came) — pairing “the smallest amount” with a negative to stress “none at all” (the colloquial base of N1's 「〜たりとも」).
- “Question word ＋ でも” is its mirror: どこへも行かない (go nowhere, total negation) ↔ どこでも行ける (can go anywhere, total affirmation) — learn them as a pair.
- Don't confuse the conjunctive 「〜ても (even if)」: the 「ても」 in 「雨が降っても行く (I'll go even if it rains)」 is the concessive conjunctive, a different thing from this particle も — though the spirit (coverage, concession) is related.
💡 Quick takeaway
も's most overlooked power is the “reset to zero” force it has with negatives: question word ＋ も ＋ negative = nothing at all (何も・誰も・どこにも). Learn it paired with 「でも (all-affirmative)」 — も ＋ negative = zero, でも = all. Bank two more handy points: ① も stacks onto に/で/と (にも・でも・とも), it doesn't swallow them; ② number ＋ も = “as many as” (feels like a lot), number ＋ しか〜ない = “only” (feels like few). Master these and a tiny も lets you play with a lot of nuance.
❓ Common questions
Q: What's the difference between 「何も」 and 「何でも」?
Opposite directions! 「何もない」 = nothing (with a negative, total negation); 「何でもいい」 = anything's fine (with an affirmative, total affirmation). Mnemonic: も ＋ negative = zero, でも ＋ affirmative = all OK. Likewise 誰も来ない (no one comes) ↔ 誰でもいい (anyone's fine), どこにも〜ない ↔ どこでも〜.
Q: Is 「日本も行きたい」 correct?
Not quite natural. Location に can't be swallowed by も directly — keep に and add も = 「にも」: 日本にも行きたい (want to go to Japan too). Likewise 友達とも話す (talk with friends too), ここでも買える (can buy here too). Only subject/object は/が/を swap to も directly.
Q: Is the も in 「三時間も待った」 “also”?
No. This is number ＋ も = emphasis “as many as, no less than”: 三時間も待った = “waited as long as three hours” (feels long). Conversely 「三時間しか寝ていない」 = “only slept three hours” (feels short). Same number — も finds it many, しか〜ない finds it few.
Q: Does 「肉も魚も食べない」 mean “don't eat meat, but eat fish”?
No — it's neither: “eat neither meat nor fish.” 「〜も〜も」 with a negative = none of them; with an affirmative = all of them (肉も魚も食べる = eat both). To express the contrast “don't eat meat but do eat fish,” use は: 肉は食べないが、魚は食べる.
🖊️ Practice Quiz
Q1. 「A：私は納豆が嫌いです。B：私___嫌いです。」What does B fill in?
(A) が (B) は (C) も (D) を
Q2. 「昨日は___食べませんでした。」(ate nothing) Fill the blank.
(A) 何かを (B) 何でも (C) 何も (D) 何かが
Q3. 「___いいです。」(any time is fine) What's the most natural?
(A) いつも (B) いつでも (C) いつかは (D) いつにも
Q4. 「田中さん___山田さん___来ました。」(both came) Fill the blanks.
(A) と・と (B) は・は (C) が・が (D) も・も
Q5. 「三時間___待ちました！」What tone does it express?
(A) waited within three hours
(B) emphasizing a long wait, with surprise
(C) about three hours
(D) only three hours
Answer Key
1. (C) も ── B says ‘I dislike it too'; adding the same situation uses も. が is ‘I dislike' without ‘too'; は is topic, no additive sense.
2. (C) 何も ── ‘question word ＋ も ＋ negative' = total negation: 何も食べなかった = ate nothing.
3. (B) いつでも ── ‘question word ＋ でも' = full affirmation: いつでも = any time.
4. (D) も・も ── AもBも = both A and B.
5. (B) ── quantity ＋ も emphasizes a large amount: 三時間も = as long as three hours (with surprise).