Kaisei is a boy name with a rare feel, drawn from real birth records.
| Country | Births on record |
|---|---|
| United States since 1880 | 137 births |
Counts come from national birth registrations: the U.S. Social Security Administration, England & Wales (ONS) and Ireland (CSO). Coverage spans differ, so totals aren't directly comparable across countries.
Babies named Kaisei per year — United States (2005–2025). United States peaked in 2007 (10/yr).
Kaisei reached its peak in 2007, when it was the #18465 most popular baby name in the United States — making it a quintessential 2000s name.
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