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I assume you are referring to someone else's mum so the correct term would be o-kaa-san.

However, if you are referring to your own mum then haha or kaa-chan would be more appropriate. If the mum in question is your mother-in-law then I suggest asking her how she wants to be addressed.

I hope this answers your question

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Wiki User

16y ago

What else can I help you with?