Masahiro

Boys' name

Japanese name; meaning depends on kanji

Masahiro has been given to 63 babies in the U.S. since 1925. It was used fewer than 5 times in 2025, so it doesn't appear in the latest year's list — today it's a genuinely uncommon pick. Its peak year was 1998, with 9 recorded.

Babies named Masahiro, 2014

1 in 741,000

Masahiro over time, 1880–2025

Boys

Based on births in the U.S. Babies given the name each year. Hover the chart — or focus it and use the arrow keys — for any year. Gaps mean the name was given fewer than 5 times that year; these counts are unpublished.

Masahiro: meaning, origin, and history

Japanese name; meaning depends on kanji

Japanese

What Masahiro means

Masahiro is documented with more than one possible Japanese character combination. The Latin-letter spelling records a pronunciation; it does not specify one unique kanji spelling or one universal meaning.

Possible character meanings include right, proper, flourish, prosper, enlarge, expand.

Documented naming usage and pronunciation

Masahiro is used in Japanese.

Another recorded pronunciation is /mä.sä.çi.ɾo̞/ for Masahiro.

Origin, language, and formation

Masahiro is used in English and Tagalog. Its origins include Japanese.

Masahiro comes through Japanese まさひろ.

Pronunciation and spelling

In Tagalog, Masahiro is pronounced /masaˈhiɾo/.

American usage and historical context

In the United States, 63 boys were recorded with the name Masahiro between 1925 and 2014. Its highest annual count was 9 in 1998; its best national rank was #3,305 in 1925.

Sources & methodologyReferences, data & attribution

Meaning, origin, and language notes draw on the references below.

American popularity figures use published Social Security Administration records for this exact spelling. Counts below five for a name, sex, and year are omitted.

Wiktionary material is available under CC BY-SA 4.0.

How common is Masahiro?

Masahiro had fewer than 5 recorded uses in 2025, so these figures use 2014, the last year it was published.

Among all babies, 2014: 1 in 741,000; 5 of 3,706,812 births
Among boys only: 1 in 384,000; <0.01% of boys
Rank, 2014: Unranked; Fewer than 5 uses
Coin-flip room size: 513,874 kids; Even odds of a second one

Where Masahiro sits on the popularity scale

Rarest published (5 a year)#1 — Liam (20,818)

Chance at least one other child shares the name

If the other children were drawn at random from the 2014 national name distribution. Real classrooms cluster by region and community, so treat these as a floor, not a ceiling.

Class of 20Under 1%

Class of 30Under 1%

Grade of 100Under 1%

School of 500Under 1%

Put another way: gather 513,874 children born in 2014 and it's an even bet that one of them is another Masahiro. In a class of 30 the chance is Under 1%.

When Masahiros were born

Half of everyone ever recorded as Masahiro was born before 1992 — so the typical Masahiro is around 33 today.

Median birth year: 1992; About 33 years old
Biggest decade: 1990s; 44.4% of all use
Born in the last 25 years: 69.8%; A modern name
Recorded since 1950: 50; People you could plausibly meet

Choose a decade

1990s — 44.4% of all recorded uses (28).

Is Masahiro rising or falling?

Rank movement and count movement can disagree — the number of distinct names in use keeps growing, so a name holding a steady count still slides down the list. Both are shown.

Rank vs 1 year ago: —; Not ranked then
Rank vs 5 years ago: New entry; Not ranked then
Rank vs 10 years ago: —; Not ranked then
Births vs 10 years ago: —; Not published both years
Share of its own peak: 0%; Peak was 1998 (9)
Years since peak: 27; Years
Year-to-year steadiness: Shifting; 16.7% average annual change
Best rank ever: #3,305; 1925

Masahiro by the numbers

The raw record for each sex the name is used for.

As a boy's name

Rank in 2025: Unranked
Trend vs 5 yrs ago: —
Best rank ever: #3,305; 1925
Peak year: 1998; 9 that year
First recorded: 1925
Last recorded: 2014
All-time count: 63
Count in 2025: Under 5

Names similar to Masahiro

Matched on shared beginnings and endings, similar length, and comparable popularity.

Masanori Masaharu Masiyah Masanobu Masaaki Masten Masaichi Massai Masani Masir Akihiro Masayuki Mashawn Kenjiro Tanjiro Masih Masego Masayoshi Masaji Masashi Massey Maston Masakazu Masoud

Sibling names for Masahiro

Names from the same era and popularity tier — the two things that make a sibling set feel deliberate — skipping lookalike spellings and shared initials.

For a sister

Cydney Kalie Reilly Reanna Serina Isela Shae Taya

For a brother

Demarco Ronaldo Tariq Jaren Samual Jovan Reyes Cordell

Explore around Masahiro

Top names of 1998, Masahiro's peak year The 1990s in full Other names that peaked in 1925 Boys' names starting with M