餅は餅屋。
Every man to his trade.
彼は餅をすっかり食べたわけではない。
He didn't eat all of the rice cakes.
もちはもち屋。
Every man for his own trade.
もちを食べている時にのどに詰まらせて窒息死する老人がたくさんいる。
Many old people choke to death while eating mochi.
14 strokes
mochi rice cake
On'Yomi: ヘイ, ヒョウ
Kun'Yomi: もち, もちい
17 strokes
rice cake