@Lazy Pious, yes the Emperor's Birthday is now celebrated February 23rd for Naruhito, it started in February 2020 as I was there at the time.
Hi! Original Poster,
I just thought I would ask, do you Christmas and New Years this year as in like under 2 months away or do you mean for next year? I'm asking because New Years Eve (December 31) already has quite limited hotel availability as does January 1st and you might be limited with where you want to be by that.
If you're willing to fly Hokkaido, is an option, it just depends on what you think the people you are traveling with would like to see in Japan and what you want to do there. Since it's December, I'm going to say most hiking is going to be out. If you're looking to ski, then it might be a great time to go.
There is nothing wrong with Kobe, but as someone in the US who has lived in cities with Chinatowns and you know, is already foreign, Kobe is not quite as interesting to me. I am planning to go to Kobe this year around Christmas because it has a shop I want to visit. I also wouldn't say it's really off the beaten bath. If you mean specifically Arima onsen, just make sure to check availability if you are going soon.
Wakayama can be very cold in December. I've been there for Christmas visiting friends many years ago. If you are thinking of hiking the Kumano Kudo, there can be snow. I was just using the local train between Kainan and Tanabe and there was a dusting of snow. A lot of the onsen places outside of Shirahama are a ways from the train, so will be a further trip from Kyoto than you would think.
By the time you are traveling 2 hours from Kyoto for an onsen, you could just look at Kinosaki. Though if you do decide to Takayama or Hokkaido, they would be better for an onsen experience, since Hokkaido has a lot of onsen and the mountains right outside of Takayama have a lot of onsen (or just stay in the Associa and have a western hotel with insane amounts of onsen.
There are also some more theme parky type onsen options. From Spa World in Osaka to Tenzan no Yu in Arashiyama (Kyoto)
https://www.ndg.jp/tenzan/en/ It's really about what you want in the experience.
I think... it would help to have some idea of what you mean or want in off the beaten path. Are you thinking somewhere with hiking? Are you thinking just someplace smaller? Nara and Uji are always good if you're looking for smaller and traditional.
Hikone Castle is an underrated gem and super easy to reach from Kyoto. I went in January and while the garden was not at its best, it was still interesting. There wasn't snow when I went, but it was cold.
I went to Takayama and Shirakawa Go in February so it was quite snowy. I then went up to Hirayu onsen as a day tripper. I had specifically brought pull over boots with me, so I didn't have an issue with snow or slush. I liked Hida no Sato much more than Shirakawa Go (though I visited Hida no Sato in the Summer) and I don't remember taking off my shoes inside any of the buildings I visited in Hida no Sato.
Good luck!