Total births
145
Boys' name · since 1914
Koichi
145 babies named Koichi in U.S. Social Security records since 1914, with the highest year being 1921. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.
- 145
- total births
- 1914–2007
- years on record
- 1920s
- peak decade
- 56%
- born in that decade
145 boys have been named Koichi since 1914, though it isn't currently a top-ranked name.
According to the U.S. Social Security Administration, Koichi has been recorded 145 times among boys since 1914, though it is not among the currently most-used boys names, with its heaviest use in the 1920s. This profile covers year-by-year birth trends, decade totals, and state-level distribution, all derived directly from SSA birth-registration files spanning 1914 to 2007.
- 145 total births
- 1914–2007 years on record
- 1920s peak decade
- 56% born in that decade
Data updated Jun 2026
The verdict
145 boys have been named Koichi since 1914, peaking in the 1920s, last recorded in 2007.
- 145
- total births
- 1914–2007
- years on record
- 1920s
- peak decade
- 56%
- born in that decade
1920s
Peak decade
56% of everyone ever named Koichi was born in this single decade.
1921
Single peak year
16 babies were named Koichi in 1921 - its busiest year on record.
Koichi's usage pattern, beyond the headline number
Splitting Koichi's full recorded timeline at 1924, 40% of its total births fall in the more recent half of the record versus 60% in the earlier half -- the name was more prevalent in its earlier era than it is today. Its quietest year on record was 1914, with just 5 recorded births -- worth weighing against the 1921 peak of 16 to see the full range of the name's swing in popularity.
Koichi at a glance
Last recorded 2007Peak year
1921
Current rank
Unranked
Active since
1914
Koichi popularity over time
Annual U.S. births registered with the Social Security Administration · 1914–2007
- Peak year (1921)
- 16
- Annual births at peak, across 94 years of records
Koichi by decade
Total births in each ten-year window, peak vs trough at a glance
1920s was Koichi's strongest decade.
81 babies received the name during that ten-year window, about 56% of all-time use.
Koichi births by decade
Total births in each ten-year window
- 1910s
1910s
42 births
- 1920s
1920s
81 births
- 1930s 6
1930s
6 births
- 1980s 6
1980s
6 births
- 1990s 5
1990s
5 births
- 2000s 5
2000s
5 births
What this shows Peak: 1920s at 81 births (56% of all-time use).
Koichi by state
Where Koichi concentrates geographically, total births since 1914
| Rank | State | Visual share | Births | Share of total |
|---|---|---|---|---|
| #1 | Hawaii | | 66 | 45.5% |
| #2 | Washington | | 5 | 3.4% |
Hawaii share of Koichi's total US births 45.5%
Even split
66 of 145 births nationwide. Compared to a flat distribution across 2 reporting states.
Frequently Asked Questions
How popular is the name Koichi? ▼
Koichi has been given to 145 babies in the U.S. since 1914, according to SSA data. Its last appearance in the data was 2007. 16 babies were born in 1921, its single highest year.
When was Koichi most popular? ▼
Koichi was most popular in the 1920s decade with 81 total births. The single peak year was 1921.
Where is Koichi most popular? ▼
The top states for the name Koichi are Hawaii (66 births), Washington (5 births).
How long has the name Koichi been used? ▼
The SSA has tracked Koichi since 1914 -- 94 years through the most recent 2007 data.
What names are similar to Koichi? ▼
Names with a similar sound or spelling include Koi. These share a common prefix and are also used for boys.
What to do with Koichi's data
- Koichi's decade-level peak was the 1920s (81 total births); usage has since declined to 5 in the 2000s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- Hawaii records the most Koichis (66 births) -- see the full state breakdown if geography matters to your decision. Hawaii names
- Weighing it against an alternative? Put two names side by side. Compare names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Koichi
Nearby Names Like Koichi
Names with a similar sound, spelling, or feel to Koichi
Compare Koichi side by side: Koichi vs Koi
Related Names
Names with a similar number of total births
Data Sources
Data as of June 2026. Source: U.S. Social Security Administration (SSA).
According to the Social Security Administration, this profile draws directly from the agency's public-use baby-name files (updated June 2026). See our methodology for the full extraction, aggregation, and privacy-suppression rules.
Primary: Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications, National Data, 1914–2007 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Koichi: Baby Name Since 1914 - 145 Births, Peak 1921." NameAlmanac. Accessed via https://namealmanac.com/name/koichi. Licensed CC BY-SA 4.0.
Name Almanac is rendered directly from the Social Security Administration's public baby-name files, no number is typed in by an editor. This profile for Koichi draws directly on SSA national and state-level files, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.