Traveling in mid February

Hi everyone, me and my mom are going to have a trip in mid February (9 days off due to Tet holiday, fly from Da Nang – Viet Nam). I know the weather's so cold and has snow.

Could you guys please give us some advice on where we should go? This is my first trip to Japan so I am not sure about which city I should go. My mom is in middle aged and her knees are hurting so this trip will be about the landscaping not activation I think.

Thankfully for all of yours kindly advise. 😊

by nguyendobaouyen