How tall was the tsunami wave in Japan?

Question:

I have heard 23 ft and 33 ft. Which one is it?

Answer:

Tsunami hit many places of northern Japan. You need to specify where in Japan you are talking about. Or maybe you are asking about "the tallest" tsunami?

Addition:
>I mean the one that happened on March 11th, 2011

I meant, that one hit many places.