I can’t speak to the rest of Japan, but in Tokyo, yes.

Suginami in particular seems to be very kid focused in terms of infrastructure development efforts. 6 years ago the was a wild sprouting of daycare facilities everywhere around, and these days new parks pop up everywhere. They were going to close the nearby jidoukan, and the new major seems to have reversed all of that. Japan is absolutely making an effort to reverse population decline xD