もん is a squeezed もの at the end of a line. It gives a reason, often with a pout: 行きたくないもん, “I don’t want to go, OK?”. ですもんね is a softer, agreeing version.
Casual and a little childish or sulky. With friends; avoid at work.
Two hired workers grumble about a wife and her smartphone photos, then admit they're no better for taking the job.
We do wanna earn a bit more, after all.
Textbookもう少し稼ぎたいですからね。Sentence-final "もんね" (from "ものね") gives a reason with a pouty, "after all" feel, replacing "〜ですからね".
Someone is trying to hypnotize another person into falling asleep.
I mean, I've been at this for six hours.
Textbookこれを6時間もやっていますからね。Reason "〜ですから" is replaced by sentence-final "もん" (from "もの") after "やってる"; "もんね" adds a seeking-agreement tone.
A weather forecaster whose forecast is being doubted pleads with people to trust it.
I'm a pro, after all.
Textbookプロですから。Sentence-final 「もん」 (from 「もの」) gives a reason with an insistent, slightly pouty tone: 「プロだもん」 = 「プロですから」.
Someone with a wife and kids wants to join a group date now that things have calmed down, and the other person objects.
Culture note 'Let's go drinking once things calm down' is a common polite Japanese phrase, often a vague non-promise; a 合コン is a group blind date.
Yeah, but things have calmed down!
Textbookはい、でも落ち着いたんですから。"落ち着いたんだ" plus sentence-final "もん" (from "もの") gives "落ち着いたんだもん": a whiny "but…!" reason, vs. polite "んですから".
The organizer of a death game is fussing over how the participants are being fed.
Well, we already went and made it, so…
Textbook作ってしまいましたからね。Reason 'から' is swapped for sentence-final 'もん' (from もの), plus a sighing 'なぁ'; 'てしまった' also shrinks to 'ちゃった'.
From other routines in the library. Automatic transcripts, not yet checked line by line.
〜だもん means “…so there!” (giving a reason). もん is a squeezed もの at the end of a line. It gives a reason, often with a pout: 行きたくないもん, “I don’t want to go, OK?”. ですもんね is a softer, agreeing version.
With friends: OK. With coworkers: careful. With a boss or teacher: avoid. Casual and a little childish or sulky. With friends; avoid at work.
In 1,905 live comedy routines, 〜だもん appears in 641 lines from 171 comedians.