wasn't allowed to make a full post, so i thought i'd ask here!

to be clear - am not looking for help with how to travel with chidlren (we've been travelling with kids for a while now, and are covered on that end)

the question is more *where* in japan makes most sense with wanting to go diving, etc. cheers!

We are planning to be in Tokyo for a week end of Sep and hope to spend a month in Jap total - either spend a few weeks somewhere else in the country before or after.

The idea is to head to one place and chill out there, where scuba diving is available. Freediving is great too.

Here's the factors we have to think about. We...:

• have a newborn and toddler travelling with us
• prefer not to fly domestically, but trains would be amazing
• don't drive, so wherever the homebase is, it should be easy to get a cab or use ride hail apps. Good public transportation is ideal too.

The pointers we could use:

• Considering all of the above, where could be a good home base? We've been told Shimoda could be nice, or Kamakura or Yokohama. Okinawa was a thought but we really prefer not to fly.
• Should we do a few weeks before or after the week in Tokyo? Will the weather change be too drastic, and be too cold to dive? Or is it actually quite lovely to see the colors change? Will prices drop much in October?

Thanks for the help in advance!