もちろん勿論mochiron
1.

An expression used to indicate that something is self-evident or understood without the need for discussion, implying that the conclusion has already been reached.

2.

A phrase that conveys the sense of something being inherently obvious, suggesting that it does not require explicit mention or justification.

3.

A term reflecting a certainty or affirmation that something is true, often used to reinforce a point that would otherwise be taken for granted.

Example:

「ご一緒してもいいですか」「もちろんです」