Kasai
How to say it: kuh-SY · /kəˈsaɪ/
Japanese surname and African river name meaning 'fire' in Japanese - rare modern first name.
Kasai was the 601st most popular boys’ name in the United States in 2025, given to 437 babies (Social Security Administration). The 2020s are its busiest decade so far, its births are up 22-fold in ten years, and it is projected to rise to #255 by 2030.
Updated · SSA 2025 data, published May 2026 · How we compute these figures
Key facts
| Rank among boys’ names, 2025 | #601 |
|---|---|
| Babies born in 2025 | 437 |
| Share of births | 1 in 7,586 |
| Peak decade | 2020s |
| Change over 10 years | ×22 |
| Projected rank for 2030 (estimate) | #255 |
Sources: Social Security Administration (SSA). How we compute these figures.
Its life, decade by decade
Fresh on the scene, Kasai has seen almost all of its use arrive lately and now sits at its high in the 2020s. Continued upward movement is foreseen.
What goes with it
Sharp with crisp edges and breathy lightness, Kasai feels creative and strong. Kenzo shares its bold energy and Kai offers a snappy short form.
In the classroom
In a class of 25 children born in 2025, the chance that another child is called Kasai is about under 1 in 200.
Around the world
This spelling is used in English, Japanese.
Keep exploring
About as popular as Kasai
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