Yes (はい) or No (いいえ)?
Are you totally comfortable Japanese “Yes” or “No?”
Situation: Yukiko overheard you say to your friend that you were NOT going to Yukiko’s birthday party next Saturday. Yukiko caught hold of you to ask you if that was true…
Yukiko: “Are you … are you NOT coming to my birthday party next Saturday? I overheard you say so to Kumiko.”
You: “No, I won’t. I’m invited to Takeo’s birthday party next Saturday. I promised to him I would come a couple of month ago. I wish I could.”
In English, “Yes or No” and “Affirmation or Negation after that” coordinates with each other. In Japanese, they don’t. Japanese “Yes” means a lot of things or emotions in many ways. So, as usual, you can never tell “Yes or No” until you listen to the end of the sentence.