Duty to Defend and Protect Country in Chinese / Japanese...

守土有責 is a Chinese proverb that expresses one's duty to defend the country.

守 means to guard, defend, keep watch, abide by the law, and/or observe (rules or ritual).
土 means land, earth, or soil.
有 is a possessive modifier in effect meaning “is a.”
責 means duty or responsibility.

So you get a literal translation of “Protecting [the] land is [a] duty/responsibility.”