Kaisen
#800 in 2025Boys' nameMeaning not yet documented
Kaisen has been given to 2,637 babies in the U.S. since 2004. In 2025 it ranked #800 of 13,926 boys’ names in use. Its peak year was 2025, with 311 recorded.
Babies named Kaisen, 2025
1 in 10,700
Kaisen over time, 1880–2025
Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.
How common is Kaisen?
Everything below is computed from the 2025 data — the most recent year available.
- Among all babies, 2025
- 1 in 10,700
- 311 of 3,315,165 births
- Among boys only
- 1 in 5,490
- 0.02% of boys
- Rank, 2025
- #800
- of 13,926 boys’ names in use
- Coin-flip room size
- 7,390 kids
- Even odds of a second one
Where Kaisen sits on the popularity scale
Chance at least one other child shares the name
If the other children were drawn at random from the 2025 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.
Put another way: gather 7,390 children born in 2025 and it's an even bet that one of them is another Kaisen. In a class of 30 the chance is Under 1%.
When Kaisens were born
Half of everyone ever recorded as Kaisen was born before 2020 — so the typical Kaisen is around 5 today.
- Biggest decade
- 2020s
- 56.1% of all use
- Born in the last 25 years
- 100.0%
- A modern name
- Recorded since 1950
- 2,625
- People you could plausibly meet
2020s — 56.1% of all recorded uses (1,473).
Is Kaisen rising or falling?
Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.
- Rank vs 1 year ago
- +102
- Places climbed
- Rank vs 5 years ago
- +252
- Places climbed
- Rank vs 10 years ago
- +833
- Places climbed
- Births vs 10 years ago
- 3.17×
- More babies than then
- Share of its own peak
- 100.0%
- Peak was 2025 (311)
- Years since peak
- Peaking now
- At its all-time high
- Year-to-year steadiness
- Shifting
- 24.0% average annual change
Spellings of Kaisen
Kaisen is not the most common spelling — Aiden is, with 33.6% against Kaisen's 0.34%.
Grouped by closeness of spelling (up to two letter changes), same sex, with a floor on all-time use. It catches Sophia/Sofia and Aiden/Ayden, and misses spellings that sound alike but look different, like Sean and Shawn.
Where Kaisen is used
Across 2016–2025, Kaisen was most concentrated in Mississippi — about 1 in 1,190 boys, against 1 in 8,151 across all states with data. It was least common in Minnesota (1 in 50,000).
Most concentrated
- 1Mississippi1 in 1,190
- 2Louisiana1 in 2,439
- 3Alabama1 in 2,778
- 4South Carolina1 in 3,030
- 5North Carolina1 in 4,545
- 6Indiana1 in 5,882
- 7Georgia1 in 6,250
- 8Oklahoma1 in 6,250
Shading is the share of that state's recorded boys given this name, not the raw count — otherwise the map would just show which states are biggest. Unshaded states have no published records for this period. U.S. birth records suppress state-year counts below 5; state counts therefore don't add up to the national total. Every state links to its full rankings.
Kaisen around the world
Where Kaisen ranks in official birth records elsewhere in the world. Rankings only — the number of births isn’t comparable between places, so it isn’t shown.
- England & Wales2010–2025#3,684in 2025
- Canada2010–2024#1,817in 2024
- South Australia1991–1994#531in 1994
Popularity data from Office for National Statistics, Statistics Canada and Consumer and Business Services (South Australia). ONS data under Open Government Licence v3.0. StatCan data under Statistics Canada Open Licence. CBS SA data under CC BY 4.0.
Kaisen by the numbers
The raw record for each sex the name is used for.
As a boy's name
Names similar to Kaisen
Matched on shared beginnings and endings, similar length, and comparable popularity.
Names with a curve like Kaisen
Not spelling — timing. These names rose, peaked and faded in the same years as Kaisen, so they read as being from the same moment even when they look nothing alike.
Sibling names for Kaisen
Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.