Osaka at Christmas time Hi There,

I'm thinking about taking my family to Japan in December 2018, I have been once before and I fell in love with the Kansai region. 

My idea is to see a few places I haven't been to Sapporo, Fukuoka, Hiroshima and then spend up to 2 weeks in Osaka as a base to see  around the Kansai region as I only had 1 day in Kyoto last time and I regretted not giving myself more time there. 



My only concern is that I would be there during Christmas (flying home just before new years) would there be any reason for me to avoid travelling through Christmas time (like there would be for new years with everything closed) Also open to any Kansai region suggestions for Christmas time!