I’m travelling to Japan in a few months, any essentials? (I’m new to this group so please tell me if this is posted in the wrong place)

I used to learn Japanese and remember quite a lot of the basics and hiragana + katakana but I feel like I need more to get by in my travels, especially since I'll be translating for my parents too – ahh.

Anything to do with restaurants/eating out, hotels, or just basic communication tips will help! Thank you!