Why does a white cat doll sit on the store entrance??

Question:
Why does a white cat sit on the store entrance??
Answer:
That is Maneki-Neko, or beckoning cat,a kind of good luck charm.
We wave our hand like that to say "come here".
They bring customers, money, as a result, happiness.
Pic: http://okageyokocho.co.jp/blog/tenshu/cat26/