This is the 5324th most frequent Japanese word.
hiroshima
"Hiroshima" is a Japanese city, historically known as the first location targeted by an atomic bomb during World War II.
In this sentence, 'Hiroshima' is used as a proper noun referring to the name of a city in Japan.
広島は日本の都市です。
Hiroshima is a city in Japan.
Here, 'Hiroshima' specifies the location ('in Hiroshima') where the speaker's action took place.
広島で平和記念公園を訪れました。
I visited the Peace Memorial Park in Hiroshima.
In this usage, 'Hiroshima' functions as a possessive modifier indicating that the cuisine originates from Hiroshima.