もちろん

も

ち

ろ

ん

Common wordJLPTN5Freq.FrequencyTop 500

Meanings

1

usually written using kana alone

Expresses that something is obvious, expected, or goes without saying. Used in both casual and polite speech.

てつだ

い

ます

よ

。

Of course I'll help you.

彼かれはもちろん来くると思おもっていた。

I naturally thought he would come.

〈事こと〉はもちろん、〈事こと〉もnot only ... but also ... (used to add extra information)
彼かれは英えい語ごはもちろん、フランス語ごも話はなせる。
He can speak not only English but also French.
もちろんですused alone as a polite affirmative reply meaning 'of course'
「手伝てつだってもらえますか。」「もちろんです。」
"Could you help me?" "Of course."
〈事こと〉はもちろんのことneedless to say ...; not to mention ...
勉べん強きょうはもちろんのこと、運うん動どうも大たい切せつだ。
Not to mention studying, exercise is also important.

当とう然ぜんN3
当然 expresses a logical or moral certainty and can sound more objective, while もちろん is a softer, everyday way to say 'of course'.
当あたり前まえN3
当たり前 stresses that something is common sense or self-evident and can sound blunter than the more conversational もちろん.
無む論ろんN1
無論 and もちろん both mean 'of course', but 無論 is more formal and typical of written Japanese while もちろん is the everyday spoken choice.
とも
もちろん is a plain adverb meaning 'of course', while とも in this sense is a sentence-final particle that adds emphatic, speaker-marked affirmation, often sounding more casual or old-fashioned.

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言いうまでもなく
もちろん is a casual, everyday way to say 'of course', while 言うまでもなく is more formal and emphatic, often used in writing or speeches.
もとよりN1
もちろん is the common, neutral way to say 'of course', while 元より in this sense sounds more formal and literary.
言いうまでもない
もちろん is a casual, flexible adverb meaning 'of course', while 言うまでもない is a stronger, more formal phrase stressing that something is too obvious to need saying.
確たしかにN3
もちろん readily agrees with an obvious point ('of course'), whereas 確かに acknowledges the truth of a statement, often before adding a qualification.

もちろんUsage93%
Usually written in kana; the kanji form 勿論 is rare and mostly seen in older or formal writing.
勿もち論ろんUsage7%
Kanji spelling; learners should prefer the kana form.
モチロンUsage<1%

A Sino-Japanese word from 勿論, literally “without discussion” or “needless to say,” hence “of course.”

もちろん states plainly that something is 'of course' true, whereas 疎か（おろか）specifically contrasts a lesser case with a greater one via 〜はおろか〜も.