Mortar

Mortars are used to grind up Rice Seed to get Rice, and to grind Matcha Leaves to get Matcha Powder.

Crafting
Mortars are Crafted with a Wooden Bowl, Planks, and a Stick in a vertical line.

Recipes
Mortars are used to craft:

Rice: Rice Seeds and Mortar Matcha Powder: Matcha Leaves and Mortar