Translation: For mochi [rice cakes], go to the mochi shop.
Meaning: use specialists for specialist things/tasks.
Reading: “mochi wa mochiya”
Note on usage: very often used to remind someone of the need for using tradesmen for specific tasks that require a high degree of knowledge, experience, and skill (such as making high-quality rice cakes!) – often used to somewhat-politely warn someone against attempting to undertake a task that they would be better off using a specialist for.
Listen to this proverb in Japanese:
Sketch: Black Sesame Daifuku Azuki-Red-Bean-Paste Mochi.