Kouichi
given name · Latin script
Recorded as a male name· opposite-gender records fall within measured source noise
Kouichi is a given name written in the Latin script, with more bearers in Japan than in any other country.
- JPJapan≈1 in 2K(inferred from the name graph)
- CNChina≈1 in 1.2M
- USUnited States≈1 in 6.6M
carrying the name, as Mondonomo estimates it from our sources: no national register counts it in these countries. One hue, darker where it is more common; hover a country for its figure.
- Japan (inferred from the name graph)
- Sources
- 74 (measured from records)
- ≈1 in 2.0K (inferred from the name graph)
≈63,000 people, est.
Highest-authority source
Japan, est.
measured from records inferred from the name graph
Meaning & origin
No verified etymology recorded for this name yet — the entries below are drawn from usage statistics and the name graph.
Where in the world(measured from records)
Kouichi counted together with the spellings and other-language forms grouped with it. Where a register counted another spelling, the row names it.
Sorted by bearers: national registers' counts, and Mondonomo's estimates (≈, est.) where no register counts.
| Country | Most common spelling | Sources | |||
|---|---|---|---|---|---|
| JP Japan | #301 | ≈63,000 est. | ≈1 in 2K | Kouichi | 74 |
| CN China | — | ≈1,200 est. | ≈1 in 1.2M | Kouichi | 3 |
| US United States | — | ≈50 est. | ≈1 in 6.6M | Kouichi | 57 |
| PH Philippines | — | ≈11 est. | ≈1 in 10M | Kouichi | 4 |
| DE Germany | — | ≈8 est. | ≈1 in 11M | Kouichi | 9 |
Exact figures are national registers' own counts, while figures marked ≈ and est. are Mondonomo’s estimates, counted from our sources and calibrated against those registers; hover one for how far to trust it in that country. A dash means neither exists.
Country figures for a list of names, at full precision, are available under licence rather than by scraping this table (how that works).
Notable people with this name(measured from records)
- Koichi Toheib. 1920JPnot in their usual nameJapanese aikidoka (1920–2011)
- Koichi Sugiyamab. 1931JPnot in their usual nameJapanese composer and conductor (1931–2021)
- Koichi Hamadab. 1936JPnot in their usual nameJapanese economist
- Koichi Katob. 1939JPnot in their usual nameJapanese politician of the Liberal Democratic Party (1939-2016)
- Shōhei Hinob. 1949JPnot in their usual nameJapanese actor (1949–2024)
- Koichi Tanakab. 1959JPnot in their usual nameJapanese chemist
- Kōichi Satōb. 1960JPnot in their usual nameJapanese actor
- Kōichi Yamaderab. 1961JPnot in their usual nameJapanese actor, voice actor, singer and narrator
- Koichi Wakatab. 1963JPnot in their usual nameJapanese engineer and JAXA astronaut
- Koichi Sakamotob. 1970JPnot in their usual nameJapanese film and television director, actor, stunt performer and coordinator, fight choreographer and producer
The ten people covered by the most Wikipedia language editions — a proxy for cross-cultural notability, which favours historical and Western figures over equally prominent contemporary ones — shown by birth year. Source: Wikidata (CC0).
Evidence(measured from records)
Attested in 2 sources across 1 country.
Reference works 1
- Dictionary of American Family Names
These works list the name; their figures are licensed and are not reproduced here.
Register rows as of the 2026-10-09 data build.
Frequently asked questions
- Is Kouichi a male or female name?
- Kouichi is a male name in our records. Opposite-gender entries fall within the cross-gender noise we measure in the source data, so we don't report them as usage.
- In which country does Kouichi have the most bearers?
- Mondonomo estimates about 63 thousand people named Kouichi in Japan, more than in any other country we hold, where it is most often spelled kouichi.
- How common is the name Kouichi?
- Mondonomo estimates about 63,000 people in Japan have Kouichi as their first given name, about 1 in 2.0 thousand residents. No national register counts it there; the figure is ours, calibrated against the registers that do.
- How common is Kouichi compared with other names?
- In Japan, Kouichi is the 301st most common given name of 366,905 given names recorded there.
What do you want to know about Kouichi?
Nobody replies to these one by one, but what readers ask decides what these pages answer next.
Query this name via API
curl -H "X-API-Key: YOUR_KEY" https://api.mondonomo.ai/api/v1/name-graph/kouichiThe payload this page is built from: spellings and scripts, countries and languages, related names, and the registers that attest the form. It takes a free API key (1,000 requests a day), which returns what this page shows everyone; the full country table, every register citation and the year-by-year series come with a licensed key, as does bulk access.
About this data
measured from records inferred from the name graph machine-generated
These figures come from the data snapshot of and will change as it is rebuilt.
Statistics are aggregated from the Mondonomo name corpus; related names and etymology are inferred from the name graph; pronunciation and any machine-marked transliterations are model-generated. Read how the numbers are made, including their known failure modes, and where the data comes from.
Reference works we consult — surname dictionaries, official name registers, Wikidata and Wiktionary — are named directly, beside the claims they support. The per-country source counts also include datasets of person records: we publish how many there are and their authority tier, but not their names.
Cite this page Mondonomo, “Kouichi” — the 301st most common given name in Japan. Data snapshot 2026-10-10.