Originally Posted by jch636

The Hyatt Centric Ginza might be your best bet - they definitely have connecting rooms to suites. Here's what they shared with me last year, with the caveat that all of their rooms/suites have occupancy limited to a max of 3. Also, they have a very limited number of standard suites (maybe 4 to 5), so book those ASAP if you see any availability.

* 1 King Bed : can connect to City View King Suite and Namiki Suite
* 2 Twin Beds: can connect to King Suite, 2 Twin Suite, City View King Suite, and City View 2 Twin Suite

Grand Hyatt Tokyo is another option in terms of higher # of people allowed in suites. They told me that 5 people (2 adults, 3 children) are allowed in the standard suite, but you are restricted by bedding - 1 King bed plus 1 rollaway bed. Their standard suite has a large sofa or sectional that could easily fit a kid (or two) if you're ok with that. I'm not sure if any of the suites are connecting rooms though.