This is the 9812th most frequent Russian word.
японией
The word "японией" is the instrumental case of "Япония," meaning "Japan" in English.
In this sentence, 'Японией' serves as the instrumental case of 'Япония', indicating that the speaker is expressing enthusiasm 'with/through' Japan's culture.
Я увлечён культурой Японией.
I am fascinated by Japan's culture.
Here, 'Японией' utilizes the instrumental case of 'Япония', depicting the object (Japan) used contextually in the action of traveling.
Мы путешествовали с Японией на карте.
We traveled with Japan on the map.
In this sentence, 'Японией' again demonstrates the instrumental case, acting as the noun that her impressions are about or related to.