Japanese phrase
___はお任せします。 ___ wa o maka se shi ma su
Meaning
I'll leave ___ up to you.
When to use it
Leaves a choice or decision to the other person. It is polite and shows trust, often used when the other person has better knowledge or preference.
Example dialogue
夕食、何がいいですか？ yū shoku nan ga i i de su ka
What should we have for dinner?
夕食はお任せします。 yū shoku wa o maka se shi ma su
I'll leave dinner up to you.