Kazuo Matsui
There are approximately 1 people named Kazuo Matsui living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 342,754,338 Americans.
This estimate combines SSA birth records for the first name Kazuo with Census Bureau frequency data for the surname Matsui. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Expected bearers
1
1 in 342,754,338
Named Kazuo
61
Alive today
Named Matsui
1.2K
Alive today
US population
343M
Denominator
Estimated living: 61
Rarity: Very Rare
Gender: Male
Peak year: 1921
Average age: 66
Estimated bearers: 1.2K
Rarity: Rare
Census rank: #23,852
Per 100K: 0.36
Top ancestry: Asian/Pacific Islander (81.6%)
First name trend
Kazuo: popularity over time
Year-by-year SSA birth registrations for the first name Kazuo. The peak year was 1921 with 57 births. The average person named Kazuo today is 66 years old.
Babies born per year
Ethnicity
Ancestry of the Matsui surname
Self-reported race and ethnicity breakdown for people with the surname Matsui, from the 2010 US Census Bureau. The largest group is Asian/Pacific Islander at 81.6%.
- Asian and Pacific Islander81.6%
- Two or more races10.1%
- White6.3%
- Hispanic or Latino1.8%
Methodology
How we calculated this
The first name Kazuo has a living-bearer frequency of 0.0000% of the US population, based on 61 estimated living Americans carrying this first name (from SSA birth records going back to 1880, adjusted for mortality using CDC life tables).
The surname Matsui appears at a rate of 0.36 per 100,000 residents in the 2010 Census Bureau surname file, which translates to a frequency of 0.0004%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 1 people with the full name Kazuo Matsui. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people with the surname Matsui
FAQ
Kazuo Matsui: questions and answers
How many people are named Kazuo Matsui?
We estimate approximately 1 people in the United States share the full name Kazuo Matsui. That works out to about 1 in 342,754,338 Americans. This is calculated by combining the first-name frequency (0.0000%) with the surname frequency (0.36 per 100K) against the current US population.
How rare is the name Kazuo Matsui?
We classify Kazuo Matsui as "Very Rare". About 1 in 342,754,338 Americans share this exact first and last name combination.
Is Kazuo a male or female name?
Kazuo is predominantly male. Out of 757 total SSA registrations, 100.0% were male and 0.0% were female. See the full Kazuo profile for detailed gender data.
Where does this data come from?
First-name data comes from the Social Security Administration's national baby name files (1880 to 2024). Surname data comes from the 2010 US Census Bureau decennial surname tables. Living-bearer estimates use CDC actuarial life tables to adjust for mortality. Read the full methodology.