Very typical, to see young mothers out together with their babies - especially without their husbands anywhere in sight!
The wide, open footpaths of Sapporo, with its smaller population, make this a more pleasant walk than in many other, very crowded major cities in Japan.
One interesting aside to this. After many periods of zero, then declining birth rate, and predictions of the dire consequences of that, the birth rate in Japan has started to climb again.