もちろん・勿論mochiron[2]nakadaka (mid-high)

1. adverbof course; certainly; naturally
   「ご一緒いっしょしてもいいですか」「もちろんです」↗

   "May I go with you?" "Of course."

• Synonym当然とうぜんNeutralCovers what is right or deserved as a matter of course, and can also work as a na-adjective, as in 「当然の結果」; 「もちろん」 is only an adverb meaning 'needless to say'.
• Synonym無論むろんWrittenWritten/formal alternative for 'needless to say'; more solemn than 「もちろん」 and mostly confined to writing.

For 'of course' or 'needless to say', default to 「もちろん」. In written or formal prose, reach for 「無論」; when you mean something is right or deserved, use 「当然」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. いうまでもなく、当然とうぜんのこととして。
2. いうまでもないがさらに。当然とうぜんのことであるがそれにくわえて。
3. いうまでもないこと、当然とうぜんのこと。