This is the 8683rd most frequent Korean word.
가즈오
"가즈오" is typically a transliteration of the Japanese name "Kazuo" (e.g., 一雄 or 和夫). It is used as a proper noun.
Here, '가즈오' is used as a proper noun, specifically a name.
가즈오는 친구들과 축구를 하고 있어요.
Kazuo is playing soccer with friends.
'가즈오' is used here as a phrase with an imperative nuance, translating to 'let's go'.
한국으로 가즈오!
Let's go to Korea!
In this sentence, '가즈오' is referred to as the name of a person to initiate a topic of conversation.