We spent two nights at the Hilton Odawara Resort on a recent trip to Japan and found it to be extremely relaxing - it's about 45 minutes or less south of Tokyo by train. They have beautiful pools, spa facilities, a great breakfast buffet, various sports activities, and it's in a beautiful location overlooking the bay and mountains. If you look on the Hilton forum, you may be able to find a few posts on this property - it really was one of the highlights of our trip.