This is the 3202nd most frequent Japanese word.
国土
"国土" means "national territory" or "land of a country."
Here '国土' is used to denote the overall geographical area of the country in a descriptive context.
日本の国土は森林が多いです。
Japan's land is rich in forests.
In this example, '国土' refers to the nation's territory that requires preservation or defense.
国土を守ることが我々の使命です。
It is our mission to protect the nation's land.
Here '国土' signifies the impacted physical territory of the nation due to a geographical event.