I stayed here last year with my 2 year old son.
My children are not yet able to go to the public bath, and they often make loud noises at mealtimes, so a room with an open-air bath and meals in the room are an absolute must.I have stayed at various inns, but this is the inn I would most recommend. I felt that.
First of all, the size of the open-air bath in the guest room is very large (depending on the room), and you can enjoy a spacious bath in a size that is difficult to find in places like Hakone in the Kanto region.
The food was very delicious, there was someone in charge of my room, and I was impressed by how much he talked to my children.
Traffic jams in the Kanagawa/Hakone area are severe, and although Fukushima is a long way from Saitama, you can arrive there smoothly. I highly recommend it as the price is reasonable and you can stay in a spacious room. We plan to stay again at the end of the year.