日本料理は初めてですか。
tbd
Is this your first time eating Japanese food?
Is this the first time for you to have Japanese food?
Is this the first time you've eaten Japanese food?
Is this your first time to eat Japanese food?
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初めて， 始めて， 甫めて， はじめて
1. for the first time
2. only after ... is it ..., only when ... do you ..., not until ... do you ...
3. first time, (one's) first
第一次
は
1. indicates sentence topic
2. indicates contrast with another option (stated or unstated)
3. adds emphasis
指示句子的主题；表示与另一选项（无论是否明确提及）形成对比；表示强调