Hi Kevin
Your right, Norton Japan was cooler but mostly in 2 figures degrees C . We took only light warm jackets and sweaters. Only saw rain on 2 days out of 15. A couple of days the temp reached 20 degrees plus!
I think it’s a question of packing layers to give you options but don’t forget the swimsuit as I did!
We we’re absolutely blown away by Japan, the people and culture and the welcomes we received in ports were amazing like nothing we had ever experienced. We were lucky with the blossom as many places were in full bloom.
Quest was outstanding and added to the experience with several onboard events
Hope you enjoy
Vicki