Kazuko — girls' name

What the Data Says About Kazuko

The Social Security Administration has registered 398 babies named Kazuko between 1915 and 1945, spanning 31 consecutive years of U.S. birth records. As a girl's name, Kazuko currently falls outside the top 1,000 girls' names for 1945. The name reached its historical peak in 1927, when 63 babies received it in a single year.

Decade-level aggregation shows that Kazuko performed strongest in the 1920s, accumulating 214 births during that ten-year window. Across the 4 decades of recorded activity, Kazuko shows a clear decline from its mid-century high. Geographically, the name is most concentrated in California, which accounts for 196 births — the largest state-level total in the dataset — followed by Hawaii and Washington. In total, SSA state-level files list Kazuko in 3 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Kazuko in our reference dataset. These figures derive from SSA's annual national and state-level name files, which include any name appearing at least five times in a given year or state-year; names below that threshold are suppressed for privacy and therefore excluded from the totals shown here. The 398 total represents a lower bound — actual usage may be higher in years or states where the count fell below the disclosure floor. This page is provided for informational and research purposes only and does not constitute personal, legal, or naming advice.