Blink and you might miss it, but tucked away on a side street, off the old-school shōtengai (shopping street) in Tokyo's Koenji neighborhood, is Baby King Kitchen, an establishment where even adults eat off the kid's menu.

Not entirely sure what to expect on our first outing there, we walked past a designated stroller parking area and were greeted by a steep set of stairs and a dangling string, to be pulled if you needed help getting your stroller upstairs.

We didn't, so we made our way up. It is a whimsically decorated space — walls lined with picture books, and sofas strewn with fluffy cushions shaped like donuts and ice-cream cones.