Kaisen
Boy name · #803 in 2025 · Rare
How old is the name Kaisen? In official American birth records, Kaisen has been tracked continuously since 2004, giving it 21 years of documented American history.
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. Source: Official national birth records.
Unlock the 5-year forecast and compare Kaisen against up to 5 other names.
Uniqueness: will there be another Kaisen in class?
On our rarity read — which blends how common Kaisen is today with its five-year momentum — the name reads as "rare". A high score means genuine rarity — your Kaisen will likely be the only one in the room, with the occasional spelling-out as the price.
Where Kaisen is most common
Geography matters for names, and Kaisen is no exception. Adjusted for how many boys are born in each state, Kaisen is most common in MS (1.8 per 1,000), AL (0.7 per 1,000), SC (0.5 per 1,000), TN (0.4 per 1,000), OH (0.3 per 1,000) — against a national average of about 0.2 per 1,000 boys. These are per-capita rates, so they show where Kaisen is a genuine regional favorite rather than just where the most babies are born.
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
How old is the name Kaisen?
In official American birth records, the name Kaisen first appeared in 2004 (over 21 years ago), when 10 newborn boys received the name. It has been tracked in modern national records for 21 years.
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. On our rarity scale (rarity blended with momentum) we classify it as "rare".
Data source: Official American birth records, 1880–2025, national and state files. Counts reflect registered birth records for American families.