Kaisen
How to say it: KY-sen · /ˈkaɪsən/
Modern coined name; may loosely evoke Japanese 'kaizen' (improvement) but no established etymology. A creative phonetic coinage.
Kaisen was the 61st most popular boys’ name in the United States in 2025, given to 311 babies (Social Security Administration). The 2020s are its busiest decade so far, its births are up about 32% in ten years, and it is projected to slip to #62 by 2030.
Updated · SSA 2025 data, published May 2026 · Insee 2025 data, published July 2026 · How we compute these figures
Key facts
| Rank among boys’ names, 2025 | #61 |
|---|---|
| Babies born in 2025 | 311 |
| Share of births | 1 in 571 |
| Peak decade | 2020s |
| Change over 10 years | +32% |
| Projected rank for 2030 (estimate) | #62 |
| In France, 2025 | #275 among boys’ names, 0 births |
Sources: Social Security Administration (SSA), Insee (France). How we compute these figures.
Its life, decade by decade
Coined in recent decades, Kaisen surged to its top in the 2020s at #61. It remains at that summit for now though a slight dip is likely next.
What goes with it
Crisp edges meet breathy softness across two syllables. Kai, already a nickname, pairs naturally with Braylon as a stylistic ally.
Nicknames
- Kai
- Kais
Honouring a Kaisen in the family
In the classroom
In a class of 25 children born in 2025, the chance that another child is called Kaisen is about 1 in 24.
Around the world
This spelling is used in English.
In France: #275 for boys in 2025.
Keep exploring
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