Japanese phrase
大切に使います。 tai setsu ni tsuka i ma su
Meaning
I will treat it with care.
When to use it
Promises to handle an item carefully. The phrase is polite and appreciative, especially when accepting a gift or something valuable from another person.
Example dialogue
この時計、プレゼントです。 ko no tokei pu re ze n to de su
This watch is a gift for you.
ありがとうございます。大切に使います。 a ri ga tō go za i ma su tai setsu ni tsuka i ma su
Thank you. I will treat it with care.