The Japanese particle も (mo) is one of the first particles learners encounter, and for good reason: it appears constantly in everyday speech. At its core, も means ‘also,’ ‘too,’ or ‘either,’ and it works by replacing the particles は (wa) or が (ga) to add one item to what was just said. Understanding exactly when and how to use も — and when not to — will make your Japanese sound noticeably more natural.
This guide covers the main functions of も, how it interacts with other particles, how it changes meaning in negative sentences, and the mistakes learners most often make.
What Does も (Mo) Mean?
も is a binding particle (係助詞, kakari-joshi) that signals inclusion or addition. It tells the listener that the new information applies in the same way as something already mentioned.
| English meaning | Japanese context |
|---|---|
| also / too | Positive sentences adding a second subject or object |
| either / neither | Negative sentences agreeing with a negative |
| even | Emphasizing something unexpected or extreme |
| both / all | Listing multiple items that share the same condition |
Core Usage 1: ‘Also’ and ‘Too’ in Positive Sentences
The most common use of も is to say that something also applies. It replaces は or が when the subject is being added to an existing statement.
Structure: [Noun] + も + [verb or adjective phrase]
Example 1
田中さんは学生です。
Tanaka-san wa gakusei desu.
Ms. Tanaka is a student.
山田さんも学生です。
Yamada-san mo gakusei desu.
Ms. Yamada is also a student.
Here, も replaces は. Using は in the second sentence would imply a contrast; も signals agreement and inclusion instead.
Example 2
私はコーヒーが好きです。お茶も好きです。
Watashi wa koohii ga suki desu. Ocha mo suki desu.
I like coffee. I like tea, too.
Notice that in the second sentence, も replaces が. The particle が does not appear alongside も.
Core Usage 2: ‘Either’ and ‘Neither’ in Negative Sentences
When も appears in a negative sentence, it shifts meaning to ‘either’ or, in paired negative constructions, ‘neither … nor.’
Example 3
A: 私はすしが好きじゃないです。
Watashi wa sushi ga suki ja nai desu.
I don’t like sushi.
B: 私も好きじゃないです。
Watashi mo suki ja nai desu.
I don’t like it either.
If Speaker B used は instead of も here, the sentence would sound like a contrast or a new topic, not an agreement. Using も makes it clear that B is aligning with A’s negative statement.
Example 4 — Neither … nor (〜も〜も〜ない)
時間もお金もない。
Jikan mo okane mo nai.
I have neither time nor money.
Repeating も before each noun and ending with a negative verb is the standard way to express ‘neither A nor B’ in Japanese.
Core Usage 3: Emphasis — ‘Even’
も can also express surprise or unexpectedness, similar to ‘even’ in English. This use often highlights something that goes beyond the expected range.
Example 5
子供も知っている。
Kodomo mo shitte iru.
Even children know that.
The speaker implies that if children know it, certainly adults do too. The emphasis here is on how obvious or widespread something is.
Example 6
百円もない。
Hyaku-en mo nai.
I don’t even have 100 yen.
This expresses that the amount is unexpectedly small. も in negative sentences with numbers often carries this emphatic ‘not even’ nuance.
How も Interacts With Other Particles
A common source of confusion is how も combines with — or replaces — other particles. The rule is straightforward but important.
| Original particle | With も | Notes |
|---|---|---|
| は (wa) | Replace with も | も takes over the topic-marking role |
| が (ga) | Replace with も | が disappears; do not write がも |
| を (wo) | Replace with も | をも exists but sounds literary or formal |
| に (ni) | にも (ni mo) | Both particles are kept; にも is common |
| で (de) | でも (de mo) | Both particles are kept; でも also means ‘but’ |
| へ (e) | へも (e mo) | Both particles are kept |
| から (kara) | からも (kara mo) | Both particles are kept |
Key rule: Replace は and が with も. Keep directional, locative, and other case particles and add も after them.
Example 7 — にも
東京にも大阪にも行きました。
Tookyoo ni mo Oosaka ni mo ikimashita.
I went to both Tokyo and Osaka.
For related guidance on は and が, see Japanese Particles: How to Use Wa and Ga Correctly. For に and で, see Japanese Particles Ni and De: How to Use Them Correctly.
Formality and Register
The particle も itself does not change based on formality. It works in casual speech and formal writing alike. What changes is the verb ending around it.
Casual:
私も行く。
Watashi mo iku.
I’m going too.
Polite:
私も行きます。
Watashi mo ikimasu.
I’m going too.
Formal written:
本製品もその対象となります。
Hon seihin mo sono taishou to narimasu.
This product is also subject to that.
The particle も stays the same across all three; only the verb form shifts.
Common Learner Mistakes
Understanding the rule is one thing; applying it automatically in conversation is another. These are the errors that appear most often among learners at the intermediate stage.
Mistake 1: Keeping が or は alongside も
Incorrect: 山田さんがも来ます。
Correct: 山田さんも来ます。
Yamada-san mo kimasu.
Ms. Yamada is coming too.
が and は must be removed when も takes their place.
Mistake 2: Using は instead of も when agreeing with a negative
Incorrect (sounds like a contrast):
A: 魚が好きじゃないです。 B: 私は好きじゃないです。
This makes it sound as if B is making a new, possibly contrasting statement.
Correct (sounds like agreement):
A: 魚が好きじゃないです。 B: 私も好きじゃないです。
Watashi mo suki ja nai desu.
I don’t like it either.
Mistake 3: Confusing でも (demo) the particle with でも meaning ‘but’
でも as a compound particle:
どこでも行けます。
Doko de mo ikemasu.
I can go anywhere. (で = location particle + も = any-)
でも as a conjunction:
行きたい。でも、時間がない。
Ikitai. Demo, jikan ga nai.
I want to go. But I don’t have time.
These two uses share the same written form but are grammatically separate. Context makes the difference clear.
Mistake 4: Overusing も without a prior reference
も works because it connects to something already established. If there is no prior statement to refer to, も will confuse the listener.
Unclear: 私も疲れました。 (said at the start of a conversation with no context)
Clearer: 私も疲れました。 (said after the other person mentions being tired)
If you want to introduce a new topic, use は rather than も.
Quick Reference: も in Different Sentence Types
- Positive + addition: [Subject]も + positive verb → ‘also / too’
- Negative + agreement: [Subject]も + negative verb → ‘either / not either’
- Listing pairs negatively: [A]も[B]も + negative verb → ‘neither A nor B’
- Emphasis with numbers: [Number/amount]も + negative verb → ‘not even [amount]’
- Universal / any-: Question word + でも / にも / からも → ‘anywhere / anytime / from anywhere’
Frequently Asked Questions
Can も be used with question words like 何 (nani) or どこ (doko)?
Yes. Combining a question word with も (often with another particle in between) creates a universal expression. 何も (nani mo) with a negative verb means ‘nothing,’ while どこにも (doko ni mo) with a negative verb means ‘nowhere.’ In positive sentences, どこでも (doko de mo) means ‘anywhere’ and 何でも (nan de mo) means ‘anything.’
What is the difference between も and また (mata)?
Both can translate as ‘also’ or ‘again,’ but they work differently. も is a particle that attaches to a noun and replaces は or が. また is an adverb or conjunction that stands independently in a sentence, often meaning ‘again’ or ‘furthermore.’ You can use them together: また彼も来た (Mata kare mo kita — He came again too), where また refers to repetition and も signals inclusion.
Does も change meaning depending on pitch accent?
In standard Tokyo Japanese, も is a short, unstressed syllable. Pitch accent varies by region, but the grammatical meaning of も does not change based on pitch. Learners focusing on standard Japanese pronunciation do not need to worry about this distinction for も specifically.
Is をも (wo mo) correct Japanese?
をも is grammatically acceptable but sounds literary or formal, often appearing in written Japanese, classical texts, or deliberately elevated speech. In everyday conversation, を is simply replaced by も, not combined with it. Using をも in casual speech would sound unusual.
How is も different from the conjunction でも meaning ‘but’?
The conjunction でも (meaning ‘but’ or ‘however’) is a standalone word that begins a new sentence or clause. The compound particle でも (で + も) attaches to a noun and means ‘even’ or adds a universal nuance (e.g., どこでも — anywhere). They share the same form but differ in position and function within the sentence. The conjunction でも comes at the start of a clause; the particle でも follows a noun.
Conclusion
The particle も (mo) handles three main jobs in Japanese: adding items with ‘also’ or ‘too,’ aligning with negatives to mean ‘either’ or ‘neither,’ and emphasizing with ‘even.’ Its most important rule is that it replaces は and が but combines with directional and locative particles such as に, で, and から. Getting comfortable with も means paying attention to the sentence that came before — because も always refers back to something already said. Practice by noticing も in conversations and written Japanese, and focus on the particle it is replacing each time you use it.
