Practical information : Treat yourself (& others) Tokyo
Shopping centres are open every day of the year, usually from 10 am to 9 pm. Shops have a variable closing day
Budget & Tips
Shops where everything is 100 ¥, like Daiso or Can Make. There are a lot of them and some are well stocked with souvenirs and small Japanese objects. There are also 100% Japanese products. Osaka, for example, is full of second hand shops selling dishes, clothes, electronics, like the whole chain "OFF", BookOFF, HardOFF etc. Finally, flea markets sometimes allow you to find unique things
Sales start in January and July, but stores have discount periods throughout the year. During the sales, you will sometimes see fukubukuros. These are bags whose contents you can't see, but the value of all the products in them is higher than the price of the bag.
What's very local
In the fitting rooms, you have to take off your shoes in front of the door. The sales assistant holds a kind of paper bag to put on your face, to avoid sweat and make-up marks on new clothes. Haggling is not a common practice. Shopping malls have breastfeeding rooms. They are sometimes real lounges. There is water at bottle temperature, sofas, sometimes playgrounds and tables