How to say yes and no in Japanese!

There are different ways to express its approval or refusal in Japanese.

To say "yes" in Japanese, used:

The easiest way to say yes in Japanese is はい Hai.
は! Ha! formally, or ええ EE if the speaker is closer.
But actually mean validation, we can also use わかり まし た Wakarimashita (or わかっ た Wakatta less polished).
どうぞ Dozo, may also express "go" to respond favorably to a request.
However, there are other ways to acquiesce:
うん un or そう sô

To say "no" in Japanese, used:

いいえ iie formally, or いや iya if one is closer.
Japanese attach great importance to harmony in relationships. They do not like clearly refuse.
For example, to decline an offer or an invitation, they say ちょっと Chotto ... "Hmm," without responding directly.
すみません Sumimassen to apologize for not being able to respond to a request.