This is the 8261st most frequent Japanese word.
府内
"府内" means "within the prefecture," typically referring to areas under a prefectural government's jurisdiction.
In this sentence, '府内' is used to specify something being within the boundaries of a particular prefecture, namely Kyoto Prefecture.
京都府内には多くの歴史的な建造物があります。
There are many historical buildings within Kyoto Prefecture.
Here, '府内' indicates the jurisdiction of Tokyo, applying the context of a metropolitan prefecture.
新しい法律は東京都府内の全ての企業に影響を与えます。
The new law will impact all businesses within Tokyo Metropolis.
'府内' here refers to the area governed by a prefectural entity, asking about popularity within this region.