Ryoichi
given name · Latin script
Meaning: Japanese; first son of Ryo / child of Ryo
Recorded as a male name· opposite-gender records fall within measured source noise
Ryoichi is a given name written in the Latin script, with more bearers in Japan than in any other country.
- JPJapan≈1 in 5.5K(inferred from the name graph)
- EEEstonia≈1 in 705K
- SGSingapore≈1 in 795K
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). One hue, darker where it is more common; hover a country for its figure.
- Japan (inferred from the name graph)
- Sources
- 99 (measured from records)
- ≈1 in 5.5K (inferred from the name graph)
≈23,000 people, est.
Highest-authority source
Japan, est.
measured from records inferred from the name graph
Meaning & origin(measured from records)
Japanese; first son of Ryo / child of Ryo.
Sources 1
- Baby names, 25,350 baby names nicknames for your family, friends pets, including the top 100 names, 2,000 most popular…
Attested in 1 language in the etymology graph.
Where in the world(measured from records)
Ryoichi 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 | ≈23,000 est. | ≈1 in 5.5K | — | Ryoichi | 99 |
| US United States | ≈180 est. | ≈1 in 1.9M | — | Ryoichi | 90 |
| IT Italy | ≈44 est. | ≈1 in 1.4M | — | Ryoichi | 5 |
| PH Philippines | ≈21 est. | ≈1 in 5.1M | — | Ryoichi | 11 |
| BR Brazil | 20 | 1 in 11M | 20 | — | — |
| SG Singapore | ≈8 est. | ≈1 in 795K | — | Ryoichi | 7 |
| EE Estonia | ≈2 est. | ≈1 in 705K | listed | — | 1 |
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.
Registers cited: IBGE — names by decade (Kaggle mirror); the ee-siseministeerium-registry register. Figures without a register are Mondonomo estimates; see Methodology.
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)
- Ryōichi Sasakawab. 1899JPJapanese businessman, politician and philanthropist (1899–1995)
- Ryōichi Hattorib. 1907JPJapanese composer (1907-1993)
- Ryōichi Kurodab. 1911JPJapanese lawyer
- Ryōichi Mikitanib. 1929JPJapanese economist (1929-2013)
- Ryōichi Hondab. 1940JPJapanese politician (1940-2022)
- Ryoichi Ikegamib. 1944JPJapanese manga artist
- Ryōichi Tanakab. 1947JPJapanese voice actor
- Ryoichi Kawakatsub. 1958JPJapanese association football player and manager
- Ryoichi Kimizukab. 1958JPJapanese screenwriter and director
- Ryoichi Maedab. 1981JPJapanese association football player
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 8 sources across 4 countries.
| Country | Register | Year | Count | Rank |
|---|---|---|---|---|
| BR Brazil | IBGE — names by decade (Kaggle mirror) | 2022 | 20 | — |
| BR Brazil | IBGE — Censo 2022 Nomes no Brasil per-token lookup (v3 API, given+surname) | — | 20 | #124,180 |
| BR Brazil | Brasil.IO genero-nomes (IBGE Censo 2010 mirror, CC-BY-SA) | — | 20 | #50,376 |
| EE Estonia | Siseministeerium — population register name list 2023 | 2023 | — | — |
Reference works 1
- Wikipedia given-name tokens
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
- What does the name Ryoichi mean, and where does it come from?
- Japanese; first son of Ryo / child of Ryo. Recorded by Baby names, 25,350 baby names nicknames for your family, friends pets, including the top 100 names, 2,000 most popular….
- Is Ryoichi a male or female name?
- Ryoichi 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.
- What are other forms of the name Ryoichi?
- In the etymology graph, Ryouichi is a form of the same name in other languages.
- In which country does Ryoichi have the most bearers?
- Mondonomo estimates about 23 thousand people named Ryoichi in Japan, more than in any other country we hold, where it is most often spelled ryoichi.
- How common is the name Ryoichi?
- In Brazil, the national register counted 20 people named Ryoichi in 2022, about 1 in 11 million residents.
What do you want to know about Ryoichi?
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/ryoichiThe 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, “Ryoichi”. Data snapshot 2026-10-10.