This is the 1685th most frequent Russian word.
японии
"Японии" means "of Japan" (genitive case of "Япония" - Japan).
Here, "Японии" is in the prepositional case, indicating the location where the action takes place.
В Японии природа гармонично сочетается с городским стилем.
In Japan, nature harmoniously blends with urban style.
In this sentence, "Японии" is in the genitive case, showing possession or relation.
Культура Японии известна своим богатым наследием.
The culture of Japan is known for its rich heritage.
Here, "Японии" is also in the genitive case, used to indicate the object of study.