This is the 2138th most frequent Japanese word.
愛知
Aichi: A prefecture in central Japan.
In this sentence, '愛知県' refers to the specific name of the administrative region, 'Aichi Prefecture' in Japan.
愛知県は日本の中部地方にあります。
Aichi Prefecture is located in the central region of Japan.
Here, '愛知' is used to denote the geographical area of Aichi, without specifying its full administrative designation.
私は愛知で育ちました。
I grew up in Aichi.
'愛知' in this sentence refers to the region as a producer of goods and cultural aspects, showcasing its traditions.