Koichi
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Meaning
prosperous, or happy, with ichi meaning one
How popular is Koichi around the world?
In the United States, Koichi is not on the Social Security record for 2020 to 2025: names under 5 in a year are withheld at source. Koichi is not on the 2024 record for Argentina, where small counts are withheld at source.
Koichi is on the official records of Brazil.
United States
under 5 a year
In the United States, Koichi is not on the Social Security record for 2020 to 2025: names under 5 in a year are withheld at source.
Shape drawn from US Social Security baby-name records. Koichi has stayed rare in US records the whole time: no peak decade to name.
Births with a Social Security record. Source: U.S. Social Security Administration
Argentina
last on record 2014
Koichi is not on the 2024 record for Argentina, where small counts are withheld at source.
The count never rose above 2 in a year, too few to chart.
Given-name components of births in Argentina 2012–2024; national cells are lower bounds and no sex split is published. Source: RENAPER (Argentina), Dirección Nacional de Población, given names 2012-2024
Brazil
At the 2022 census, 75 people in Brazil were named Koichi, ranked 50,418th, with a median age of 73.
Among people named Koichi living in Brazil at the 2022 census, more were born in the 1940s than in any other decade.
people alive at the 2022 census, by decade of birth
People alive and resident in Brazil at the 2022 census, a living-population count, not births; names under 20 are withheld at source. Source: IBGE, Censo Demográfico 2022
Montevideo City
last on record 1993
Koichi is not on the 2011 record for Montevideo, whose registry withholds nothing, so the spelling was not given there that year.
The count never rose above 1 in a year, too few to chart.
Births in the department of Montevideo (not all of Uruguay) by first name and year of birth, 1940–2011, from the city’s civil registry, which writes names in capitals, almost always without accents; counted as spelling groups (accent and punctuation variants merged), nothing is withheld at source, and 2012 is excluded as a partial year. Source: Servicio de Registro Civil, Intendencia de Montevideo, Partidas de Registro Civil de Montevideo (Licencia de Datos Abiertos - Uruguay); 2012 dropped as partial
Not on the record in Spain, Mexico City, Puerto Rico, England and Wales, Canada, Ireland, New Zealand, Scotland and Poland: those registries withhold small counts, so rare uses may sit below their floors.
Not on the Chile record: nametree keeps spellings that reached 5 registrations in some year, so rarer uses are not shown. Not on the France record: nametree keeps spellings that reached 20 births in some year, so rarer uses are not shown. Not on the South Australia record for 1944 to 2017: that registry withholds nothing, so this spelling was not given there in those years. Not on the Austria record for 1984 to 2025: Statistik Austria publishes every first name down to a single birth, so this name was not given there in those years (before 2010 the record covers babies with Austrian citizenship only). Not on Norway’s list: Statistics Norway lists only first names carried by 200 or more living people, so rarer names are not shown.
Keep exploring
The Koichi deep dive
Whether you’re naming a baby or exploring your own name’s history, this is a personal letter, not a list: where Koichi truly comes from, how it traveled, and what a century of records reveals. If you have grown a tree on nametree, it also considers how Koichi fits with your family’s names and surname.
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