Masasi
loc · Latin script
Recorded as a male name· opposite-gender records fall within measured source noise
Masasi is a name written in the Latin script, with more bearers in the United States than in any other country.
- USUnited States1 in 911Kas Masashi(measured from records)
- SESweden1 in 2Mas Masashi
- PLPoland1 in 3.5Mas Masashi
carrying the name, as counted by its national register where one exists and as Mondonomo estimates it elsewhere (marked ≈ and "est." on hover). Where a country counts another spelling of the name rather than Masasi itself, the figure is that spelling’s, and it is named. One hue, darker where it is more common; hover a country for its figure.
- United States (measured from records)
- 2 (measured from records)
- Sources
- 9 (measured from records)
- 1 in 911K (inferred from the name graph)
365 named Masashi, 2020
recorded for this name
Highest-authority source
United States, as Masashi
measured from records inferred from the name graph
Spellings & scripts(measured from records)
One other spelling is counted as the same name:
Locally spelled Masashi in US United States and Масаси in RU Russia.
Spellings marked ● are how people bearing the name write it in our records, and ○ marks a model's transliteration; click a spelling to open its page.
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)
Masasi 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 | |||
|---|---|---|---|---|---|
| US United States | 365as Masashi | 1 in 911K | 365 | Masashi | 5 |
| BR Brazil | 50as Masashi | 1 in 4.2M | 50 | — | — |
| PL Poland | 11as Masashi | 1 in 3.5M | 11 | — | — |
| SE Sweden | 5as Masashi | 1 in 2M | 5 | — | — |
| RU Russia | ≈2 est. | ≈1 in 68M | — | Масаси | 9 |
365 people counted by Census Bureau — First Name Frequency 2020 by sex, 2020. 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: Census Bureau — First Name Frequency 2020 by sex; IBGE — names by decade (Kaggle mirror); dane.gov.pl — PESEL given names (first + second name position, 2026-01-20); dane.gov.pl — PESEL living persons (names); Skatteverket — Sök hur många som har ett visst namn (living population). 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)
- Masashi Wakib. 1945JPJapanese politician
- Masashi Tsujimotob. 1949JPJapanese teacher
- Masashi Shimakawab. 1950JPJapanese political scientist (1950-)
- Masashi Oguchib. 1956JPJapanese historian
- Masashi Igarib. 1960JPJapanese botanist, musician
- Masashi Iwasakib. 1966JPJapanese illustrator (born 1966)
- Masashi Nakayamab. 1967JPJapanese association football player and manager
- Masashi Nishiyamab. 1985JPJapanese judoka
- Masashi YamaneJPJapanese voice actor
- Masashi FujiiJPresearcher (ORCID 0000-0002-1586-6435)
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
- 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
- In which country does Masasi have the most bearers?
- In the United States, the national register counted about 365 people named Masashi, more than in any other country we hold.
- Where is Masasi most common?
- No national register we hold counts the spelling Masasi itself. The densest figure for its family of spellings is United States's: the national register counts about 1 in 911 thousand people named Masashi.
- How common is the name Masasi?
- In the United States, the national register counted 365 people named Masashi in 2020, about 1 in 911 thousand residents.
What do you want to know about Masasi?
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/masasiThe 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, “Masasi”. Data snapshot 2026-10-10.