People travel from all over the world to visit Kyoto. You will need many days to spend here in order to enjoy the town, as there’s so many places to hang around. Kyoto is about a 2.5 hour journey away from Tokyo by Hikari bullet train.
If you only have one day to spend, that would also work out if you focus on a specific area to visit. I was there for only one day today and had a great, relaxing holiday to refresh.