If you must visit only one of the two imperial villas, Katsura is the ultimate must see in a city full of them.
If you have a full day, you can visit both of the imperial villas.
mnli hypothesis: If you have a full day, you can visit both of the imperial villas. premise: If you must visit only one of the two imperial villas, Katsura is the ultimate must see in a city full of them.