Nippori Minami Park

A very large neighborhood park with broad lawns and play areas that works well for bikes, balls and an unstructured afternoon.

Kids get a playground, old train and little monorail ride, all in a park that also works for cherry blossom season.

The windmill and pond make this feel different from a normal city park, with lawns that work well for a picnic.

The samurai armor and swords are the easiest entry point for kids, and the huge grounds mean you can keep the visit flexible.

Rooms are set up for longer stays with kitchens and laundry, which is exactly what makes traveling with kids less annoying.

The rooftop penguins are the memorable part, and the whole aquarium is small enough to do without exhausting everyone.