i am planning a trip to Tokyo Kyoto and Osaka this Christmas Season (DEC 24- DEC 31)

What clothing should I bring?

I know it doesnt snow, but how is the weather?

i research clothing options in the web, but its mostly very diverse. Some wearing heavy coats while some are just wearing warm jackets.

Do I need to bring thermals? or layering is just fine?

I have been to Hokkaido last year during Fall (October) and the weather is bearable especially during morning.

Also any other information tips especially on clothing and personal essentials will be greatly appreciated... thanks

Hope you can help me