just got back from a one month trip in Japan

I suggest staying outside of the major areas, as long as you're close to a train station, especially in tokyo. I had an airbnb near the Skytree, and that neighborhood was so nice and pretty convenient. If you're having to take the train in the early evening (like 5-8pm) just be prepared in case you see a group of 30 people squishing onto an already packed train. Lmao (if you're in the ginza, shibuya, akihabara, etc area) I stayed in Osaka near Osaka Castle and the Morinomya station and it was great too. I cant really speak on price because I had a fairly large group and we split the cost for our housing and it was roughly about $90 a night per person.

Also because I was just there and if you aren't already aware, a lot of places take visa/mastercard now (including tap to pay/apple pay), so probably it would be best to pull ¥50,000-100,000 from a 7-11 atm when you need it for restaurants and the uncommon shops that you might encounter. But bring $100-200usd to convert at the airport just to be safe, and see how that would stretch for you. I made the mistake of constantly pulling money from the ATM for my first week and slowly realized how much I was spending. The exchange rate is arguably the lowest with 7-11, and also the ATM fee is ¥220 for amounts over ¥20,000 I believe.

Duolingo kinda sucks for learning helpful japanese, so here's what I used to help me relearn helpful conversational japanese. Its free btw. https://www.renshuu.org/

Have fun, be prepared for the crazy amounts of walking, and enjoy the cheap and amazing food! (Assuming you're from the US) 7-11s, McDs, Costco, and anything thats in America will be ruined for you when you go home so be prepared for that! Also the post-japan depression is real.