Having stayed at the Hyatt House in Kanazawa, I can tell you these properties are perfectly set up for families. The rooms actually understand what families need - real kitchenettes (not just a coffee maker), laundry facilities, and enough space to spread out. Plus, their lounges offer complimentary drinks and snacks throughout most of the day, which is a game-changer when traveling with kids.
The Tokyo Shibuya location offers that same family-friendly setup but in one of Tokyo's most exciting districts. Like Kanazawa, they've got those incredible lounges with free drinks (including beer and wine for parents!), plenty of space to relax, and staff who understand what traveling families need.
If you can grab a room at either property, do it. Having a properly equipped apartment-style room with hotel amenities makes traveling with family so much easier. Just book early - these places tend to fill up fast because families who know, know.