Souvenir shopping – baby things and baby advice?

Does anyone know where i can go to learn more about baby brands in Japan? I'm looking for good quality clothing, accessories, bento boxes, backpacks, etc for a toddler/child.

Curious if the Japanese use things like harness backpacks for small children who are walking or learning to walk, for safety in crowds for example.

What is the culture like for young children in public? Are people generally accepting of a child who might be whining at dinner or running around in a store? What about breastfeeding in public?

Not our first time going, but first time with a child under 2.

Thanks!

by crzswtsgrhi