Koichi
Meaning
prosperous, or happy, with ichi meaning one
Popularity, 1890–2024
Shape drawn from US Social Security baby-name records. Koichi has stayed rare in US records the whole time: no peak decade to name.
See popularity in Brazil
Popularity in Brazil
75 people · the #50,418 first name in Brazil · median age 73
Among people named Koichi living in Brazil at the 2022 census, more were born in the 1940s than in any other decade.
Source: IBGE, Censo Demográfico 2022
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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