This is the 7906th most frequent Japanese word.
坂口
"Sakaguchi" is a Japanese surname meaning "slope entrance."
坂口 is used as a surname here, identifying the person referenced.
坂口さんは昨日の会議で重要な提案をしました。
Mr. Sakaguchi made an important proposal in yesterday's meeting.
坂口 is used as a combination of 'slope' ('坂') and 'entrance' ('口'), indicating an entrance of a steep slope.
この坂口は急で車の通行が難しい。
This slope is steep, making it difficult for cars to pass.
坂口 is used as a proper noun, denoting the name of a location or station.