We’re traveling to Japan for the first time in early February, and we’re going with another couple. We only have 10 days, and we’re aiming to have a day in a ryokan between our hotel in Tokyo and our hotel in Kyoto.

Could you recommend a ryokan anywhere roughly between Tokyo and Kyoto that:
1. Provides in-room onsen
2. Incredible kaiseki experience
3. Can accommodate a shellfish allergy
4. Luxe accommodations
5. Would be a good experience for the 4 of us together, this is the confounding factor that I’m struggling with.