A "please prepare these things" note (持ち物, mochimono) is the school's
own list. The Ministry of Education's guidebook does not publish a
national shopping list, and it does not name a backpack brand.
What it does say:
Many elementary schools do not regulate everyday clothes or belongings.
For physical education, changing into clothes that are easy to move in
is the usual pattern.
Junior highs more often set a uniform (服装). Shoes should be easy to
walk and exercise in.
Inside the building, most schools ask children to change into indoor
shoes (上履き, uwabaki).
Most schools forbid nail polish and jewellery such as pierced earrings
at school, and forbid buying or eating snacks at school.
If a paper lists items and a date, buy or label what that paper names.
Ask the school before you buy a large item that the paper does not mention.
Your child's dates, not the general ones
Add your child and ward. The timeline does the rest.