Ginza
Ginza is the notable shopping district. It has a lot going on, and some of the highest end luxury brands have stores there. But who cares about those?! Here are the places you should check out for some fun and affordable stuff.
Ito-ya
https://www.ito-ya.co.jp/
Ito-ya is a stationery store with a history and has multiple store locations around Tokyo. You’ll want to visit the flagship store, which is 8 floors of delight.
It is surprisingly comprehensive in its selection of goods, and there is probably something for anyone there.
Notably, this is one of the best places to purchase postcards, and it even has a mailbox on the same floor (make sure to have postage before going)!
Tip: the escalators only go up; there is a main elevator that is often used, next to the staircase going down. There is also a secondary elevator near the back of the store that goes to select floors (1st, 5th, and 8th).
MUJI
https://shop.muji.com/jp/ginza/en/
MUJI is a lifestyle brand focusing on well-designed and sustainable goods.
MUJI closed their SF Bay Area stores, so visiting the flagship store is a treat; despite having just been to Ito-ya, I ended up getting most of my stationery from here instead! 
This store has a cafe, grocery, diner, bar/lounge, and is even topped with a MUJI hotel (you know those rooms must be cozy and beautiful!). And then just about anything you can think of for your home or person, in a succinct and well-designed form.
Moominshop
https://www.moomin.co.jp/shops/moominshop/ginza
For fans of Moominvalley, there is a lot to do in Tokyo and the surrounding areas: shops, cafes, coffee stands, and even a whole amusement park a couple hours by train.
The Moominshop in Ginza is a nice mix of fancy and practical goods. And of course, many beautiful prints in various forms, all from different iterations of Moominvalley and featuring the distinct style and colors of Tove Jansson.
Soba Hanaichi
https://www.seiryu-syuzou.co.jp/sakagura/brand/hanaichi.html
There are many food options in the Ginza area, yet as a vegetarian, most menus are limited. I was wandering around near the station when I found this soba place, complete with a ticket vending machine outside.
The kakiage soba is ÂĄ480, and the machine had an IC reader, so I paid quickly with my Welcome Suica card. 
The place seats maybe eight folks, in front of the kitchen, and the bowls are served very quickly. It was cold and blustery outside, so the entire experience of slurping down delicious hot noodles was amazing.
I’m incredibly fond of soba stands near train stations and plan to visit this one any time I’m near Ginza. 