why is it?

When we mix vinegar with rice for sushi, we use a wooden pail and rice scoop.

Why must it be a wooden pile!?

because wooden pail absorbs extra liquid flowing from rice,

finished in the "syari(sushi rice)" that is in a good conditions.

one more word today. speaking about "Gari".

Ginger of the slice which soaked in sweetened vinegar,it is called
"GARI".

It is called GARI Because when you eat, it make a sound "gari""gari."

or when you slice ginger, it make a sound.