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Kaizen

#364 in 2025Boys' name

Improvement

Kaizen has been given to 3,070 babies in the U.S. since 2004. In 2025 it ranked #364 of 13,926 boys’ names in use. Its peak year was 2025, with 895 recorded.

Babies named Kaizen, 2025

1 in 3,700

Kaizen over time, 1880–2025

BoysGirls
02505007501K18801900192019401960198020002020

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 Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Kaizen: meaning, origin, and history

Improvement

Deeper origin not confirmed in the cited records

What Kaizen means

Kaizen means “improvement”.

Related names and everyday forms

Related names include Kyson.

American usage and historical context

In the United States, 3,039 boys were recorded with the name Kaizen between 2004 and 2025. Its highest annual count was 895 in 2025; its best national rank was #364 in 2025.

Over 5 years its rank rose, from #1,584 in 2020 to #364 in 2025. Over 10 years its rank rose, from #2,333 in 2015 to #364 in 2025.

In the United States, 31 girls were recorded with the name Kaizen between 2019 and 2025. Its highest annual count was 9 in 2024; its best national rank was #10,656 in 2024.

Over 5 years its rank fell, from #12,764 in 2020 to #16,033 in 2025.

Sources & methodologyReferences, data & attribution

Meaning, origin, and language notes draw on the references below.

American popularity figures use published Social Security Administration records for this exact spelling. Counts below five for a name, sex, and year are omitted.

How common is Kaizen?

Everything below is computed from the 2025 data — the most recent year available.

Among all babies, 2025
1 in 3,700
895 of 3,315,165 births
Among boys only
1 in 1,910
0.05% of boys
Rank, 2025
#364
of 13,926 boys’ names in use
Coin-flip room size
2,569 kids
Even odds of a second one

Where Kaizen sits on the popularity scale

Rarest published (5 a year)#1 — Liam (20,818)

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.

Class of 20Under 1%
Class of 30Under 1%
Grade of 1003%
School of 50013%

Put another way: gather 2,569 children born in 2025 and it's an even bet that one of them is another Kaizen. In a class of 30 the chance is Under 1%.

When Kaizens were born

Half of everyone ever recorded as Kaizen was born before 2023 — so the typical Kaizen is around 2 today.

Median birth year
2023
About 2 years old
Biggest decade
2020s
82.5% of all use
Born in the last 25 years
100.0%
A modern name
Recorded since 1950
3,039
People you could plausibly meet
Choose a decade

2020s — 82.5% of all recorded uses (2,508).

Is Kaizen 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
+138
Places climbed
Rank vs 5 years ago
+1,220
Places climbed
Rank vs 10 years ago
+1,969
Places climbed
Births vs 10 years ago
15.98×
More babies than then
Share of its own peak
100.0%
Peak was 2025 (895)
Years since peak
Peaking now
At its all-time high
Year-to-year steadiness
Volatile
37.7% average annual change
Best rank ever
#364
2025

Spellings of Kaizen

Kaizen is not the most common spelling — Aiden is, with 39.6% against Kaizen's 0.47%.

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 Kaizen is used

Across 2016–2025, Kaizen was most concentrated in Hawaii — about 1 in 323 boys, against 1 in 6,159 across all states with data. It was least common in Utah (1 in 25,000).

4310 per 100,000

Most concentrated

  1. 1Hawaii1 in 323
  2. 2Louisiana1 in 2,564
  3. 3Mississippi1 in 2,564
  4. 4Alabama1 in 3,704
  5. 5Arkansas1 in 3,704
  6. 6Georgia1 in 3,846
  7. 7Oklahoma1 in 4,000
  8. 8North Carolina1 in 4,762

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.

Geographically, Kaizen is one of the more regionally concentrated names in the country — more concentrated than 100% of the names used widely enough to compare. See the most regional names

Kaizen around the world

Where Kaizen 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 & Wales
    2005–2025
    #1,226
    in 2025
  • France
    2022–2025
    #2,841
    in 2025
  • Canada
    2017–2024
    #794
    in 2024
  • South Australia
    2011–2011
    #784
    in 2011

Popularity data from Office for National Statistics, Institut national de la statistique et des études économiques, Statistics Canada and Consumer and Business Services (South Australia). ONS data under Open Government Licence v3.0. INSEE data under Licence Ouverte / Etalab 2.0. StatCan data under Statistics Canada Open Licence. CBS SA data under CC BY 4.0.

Kaizen by the numbers

The raw record for each sex the name is used for.

As a boy's name

Rank in 2025
#364
Trend vs 5 yrs ago
Up 1,220
Best rank ever
#364
2025
Peak year
2025
895 that year
First recorded
2004
Last recorded
2025
All-time count
3,039
Count in 2025
895

As a girl's name

Rank in 2025
#16,033
Trend vs 5 yrs ago
Down 3,269
Best rank ever
#10,656
2024
Peak year
2024
9 that year
First recorded
2019
Last recorded
2025
All-time count
31
Count in 2025
5

Names similar to Kaizen

Matched on shared beginnings and endings, similar length, and comparable popularity.

KaidynKainoaKaisenKaiserKaizerKainenKaisonKaineKaidanKaiusKailenKainanKaisynKailebKailerKairosKaidonKailanKaitoKainKaiyzenKaimanaKairavChozen

Names with a curve like Kaizen

Not spelling — timing. These names rose, peaked and faded in the same years as Kaizen, so they read as being from the same moment even when they look nothing alike.

CassianKyaireRhodesAtreusKayceKyroKylianAmiriZyairRiggsSevynBellamy

Sibling names for Kaizen

Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.

Explore around Kaizen

Top names of 2025, Kaizen's peak yearThe 2020s in fullOther names that peaked in 2025Boys' names starting with K