餅もちは餅もち屋や

expression

every man knows his own business best; one should go to specialists for the best results

Proverb meaning that for any task, it's best to rely on an expert in that field, just as you would go to a rice cake shop for rice cakes.

See also: 餅

• 餅もちは餅もち屋やで、法ほう律りつのことは弁べん護ご士しに任まかせたほうがいい。

  As the saying goes, 'for rice cakes, the rice cake shop' — you should leave legal matters to a lawyer.