What's this sign (part1)

Today, I have some quiz.
Can you answer them?
There are the answers below.

Well, Let's start!

Q1.  What's this road sign?   Hint: you will find around a crossroad

Q2. What's this road sign?   Hint: Pay attention to thirty

Q3. What's this road sign?    Hint: a man is walking on something.



Answer:

A1.  To stop here once

A2.  Speed limit 30km per hour

A3.  There is a crosswalk in front of here

If you visit Japan ,  Please keep them.