Kasai is a rare boys' name that peaked in 2025 and has grown less common since.
Kasai is predominantly a boy name. In 2025 it ranked #639 among boys (437) and #12,529 among girls (7) — overall #1,277 across all names. The charts below show girls and boys separately.
| Year | U.S. births | U.S. + territories | ♀ Rank | ♂ Rank |
|---|---|---|---|---|
| 2025 | 444 | 444 | #12,529 | #639 |
| 2024 | 95 | 95 | — | #1,747 |
| 2023 | 69 | 69 | #16,353 | #2,235 |
| 2022 | 57 | 57 | — | #2,454 |
| 2021 | 45 | 45 | — | #2,794 |
| 2020 | 52 | 52 | — | #2,486 |
| 2019 | 76 | 76 | #14,664 | #2,071 |
| 2018 | 32 | 32 | — | #3,480 |
| 2017 | 26 | 26 | — | #4,043 |
| 2016 | 19 | 19 | — | #5,046 |
| 2015 | 15 | 15 | — | #5,876 |
| 2014 | 10 | 10 | — | #7,854 |
| 2013 | 8 | 8 | — | #9,230 |
| 2012 | 11 | 11 | — | #7,302 |
| 2011 | 8 | 8 | — | #9,193 |
| 2010 | 7 | 7 | — | #10,225 |
| 2009 | 7 | 7 | — | #10,445 |
| 2008 | 8 | 8 | — | #9,437 |
| 2007 | 8 | 8 | — | #9,338 |
| 2006 | 9 | 9 | — | #8,394 |
| 2005 | 10 | 10 | — | #7,405 |
| 2004 | 7 | 7 | — | #9,456 |
| 2003 | 12 | 12 | — | #6,063 |
| 2002 | 22 | 22 | — | #3,860 |
| 2001 | 6 | 6 | — | #9,926 |
| 2000 | 8 | 8 | — | #7,829 |
| 1999 | 7 | 7 | — | #8,303 |
| 1996 | 5 | — | — | #9,789 |