Kaisen
Boy name · #803 in 2025 · Uniqueness 42/100
Kaisen is currently the #803 boy name in the United States — 311 babies received it in 2025. A decade ago it stood at #1625, so the name has been rising over the past ten years. Roughly one in every 5,788 boys born in 2025 was named Kaisen.
The 21-year story
Kaisen first appears in the Social Security records in 2004, when 10 boys received the name. Its all-time peak is essentially right now: 2025, with 311 babies and a rank of #800. Names at their peak can keep climbing — or be one trend cycle from the long slide that eventually hits most popular names. Following the curve matters more than today's snapshot: a name's position on its rise-peak-decline arc is the best predictor of how common it will feel in a kindergarten class five years from now.
Babies named Kaisen per year, 1880–2025. Source: SSA.
Unlock the 5-year forecast and compare Kaisen against up to 5 other names.
Uniqueness: will there be another Kaisen in class?
Kaisen scores 42 out of 100 on our uniqueness scale, which blends current rarity with five-year momentum — putting it in the "distinctive" band. That middle band is the sweet spot many parents hunt for: recognizable without being everywhere.
Where Kaisen is most common
Geography matters for names, and Kaisen is no exception. In 2025 the states with the most Kaisens were TX (33), MS (20), FL (17), OH (17), NC (15). Raw counts naturally favor populous states, but the spread still hints at where the name is part of the local naming culture.
Names like Kaisen
Statistically, parents drawn to Kaisen tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Kaysen, Kolsen, Kaycen, Kysen, and Caysen.
KaysenKolsenKaycenKysenCaysenChosenKasenKylen
Rank history (last 25 years)
| Year | Babies named Kaisen | Rank |
|---|---|---|
| 2025 | 311 | #800 |
| 2024 | 261 | #902 |
| 2023 | 241 | #937 |
| 2022 | 254 | #908 |
| 2021 | 214 | #1025 |
| 2020 | 192 | #1051 |
| 2019 | 193 | #1057 |
| 2018 | 143 | #1282 |
| 2017 | 138 | #1306 |
| 2016 | 152 | #1229 |
| 2015 | 98 | #1625 |
| 2014 | 88 | #1714 |
| 2013 | 65 | #2065 |
| 2012 | 59 | #2209 |
| 2011 | 40 | #2904 |
| 2010 | 47 | #2579 |
| 2009 | 43 | #2800 |
| 2008 | 32 | #3421 |
| 2007 | 18 | #4996 |
| 2006 | 16 | #5303 |
| 2005 | 10 | #7096 |
| 2004 | 10 | #6976 |
Frequently asked questions
Is Kaisen a popular boy name?
Kaisen ranked #803 among boys in 2025 with 311 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #1625.
When was the name Kaisen most popular?
Kaisen peaked in 2025, when 311 American boys received the name (ranked #800 that year). That peak is current — the name is at or near its all-time high right now.
How rare is the name Kaisen?
In 2025, roughly 1 in 5,788 newborn American boys was named Kaisen. It scores 42/100 on our uniqueness scale (rarity blended with momentum), which we classify as "distinctive".
Data source: U.S. Social Security Administration name statistics, 1880–2025, national and state files. Counts reflect Social Security card applications; names with fewer than 5 occurrences in a state-year are suppressed by the SSA.