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Look at the data

Every number here comes directly from birth records. No estimates, no averages — just the counts.

Current rank (2025)#10695
Babies named Kaisei in 20256
Total recorded137
Peak year2007 (10 babies)
Highest rank ever#8107
Years in records2005–2025 (19 years of data)

Frequently asked about Kaisei

What does the name Kaisei mean?
Kaisei means “Sea, ocean; improvement” from Japanese/Modern roots.
What is the origin of the name Kaisei?
Kaisei has Japanese/Modern origin. The traditional meaning is “Sea, ocean; improvement”.
How popular is Kaisei?
Kaisei ranked #10695 in 2025 — given to 6 babies that year.
Is Kaisei a boy or girl name?
Kaisei is predominantly a boys' name — over 90% of Kaiseis in registered births are male.
How long has Kaisei been recorded?
Kaisei appears in birth records across 19 years — from 2005 through 2025.

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