2000
#146,011
National surname rank
Recorded bearers 104
First available Census row
Per 100,000 0.04
Very Rare Last name
Tasaki
A Japanese surname derived from the words "tasa" (task) and "ki" (tree), possibly referring to someone involved in logging or woodworking.
According to the 2020 US Census Bureau surname tables, roughly 115 Americans carry the last name Tasaki. That puts it at #155,682 in the national surname ranking, appearing at a frequency of 0.03 per 100,000 people (about 1 in 2,980,473 residents).
This page is the full Name Census profile for the Tasaki surname. You will find the Census Bureau frequency data, a multi-census history view, an ancestry and ethnicity breakdown based on self-reported demographics, the name's meaning and origin where available, and answers to the most common questions people ask about this surname.
Bearers in the US
115
1 in 2,980,473
Census rank
#155,682
2020 decennial data
Per 100,000
0.0
Frequency rate
Recorded bearers
100
very rare in the US
Popularity narrative
The Census Bureau recorded 100 bearers of the surname Tasaki in its 2020 decennial surname file. At a rate of 0.03 per 100,000 residents, it holds the 155682nd position in the national surname ranking.
Among Census respondents with the surname Tasaki, the largest self-reported group is Asian/Pacific Islander at 79.0%. The next largest groups are Two or More Races (9.0%) and White (8.0%).
Origin
Meaning and origin of Tasaki
The surname Tasaki is of Japanese origin, and it is believed to have first emerged in the 8th century during the Nara period. The name is thought to be derived from the Japanese word "tasaki," which means "field edge" or "boundary of a field." This suggests that the name may have originally referred to someone who lived near the edge of a field or who owned land along the boundary of a cultivated area.
One of the earliest recorded instances of the surname Tasaki can be found in the Shoku Nihongi, an early Japanese chronicle that covers the period from 697 to 791 AD. In this text, there is a reference to a person named Tasaki no Oshika, who held a high-ranking position in the imperial court during the reign of Emperor Shomu.
During the Kamakura period (1185-1333), the Tasaki family was known to have held significant influence in the Kanto region of Japan. In the 14th century, a samurai named Tasaki Yorimasa is recorded as having played a prominent role in the Battle of Shijohara, which was a major conflict between the Northern and Southern Courts during the Nanboku-cho period.
Over the centuries, various branches of the Tasaki family have been established in different parts of Japan, and the name has been spelled in various ways, including Tasaki, Tasaki, and Tasaki. One notable individual with this surname was Tasaki Masaharu (1634-1718), a renowned Confucian scholar and educator who served as a tutor to several members of the Tokugawa shogunate.
Another prominent figure with the surname Tasaki was Tasaki Atsumaro (1782-1860), a scholar and historian who specialized in the study of ancient Japanese texts and records. He was instrumental in preserving and interpreting many important historical documents from the Edo period.
In more recent times, Tasaki Tsuneo (1914-1992) was a renowned physicist who made significant contributions to the field of solid-state physics. He is particularly known for his work on the theory of electron transport in metals and semiconductors, and he was awarded the prestigious Asahi Prize in 1980 for his achievements.
It is important to note that these are just a few examples of individuals with the surname Tasaki who have made notable contributions throughout history. The name has a rich cultural legacy and has been carried by many other individuals in various fields, from politics and business to the arts and sciences.
Demographics
Ancestry and ethnicity for Tasaki
Among Census respondents with the surname Tasaki, the largest self-reported group is Asian/Pacific Islander at 79.0%. The next largest groups are Two or More Races (9.0%) and White (8.0%).
The bar chart below shows how Tasaki bearers described their own race and ethnicity on the 2020 Census form. The Census Bureau groups responses into six broad categories: White, Black or African American, Hispanic or Latino, Asian and Pacific Islander, American Indian and Alaska Native, and Two or More Races. When a category has too few respondents for a given surname, the Bureau suppresses the figure to protect individual privacy, which is why some names show fewer than six slices.
Percentages are shown for every Census year so the breakdown stays comparable over time. When the source file also includes raw headcounts, Name Census shows those alongside the percentages in the legend.
Keep in mind that these are self-reported numbers. A person's surname does not determine their race or ethnicity, and the distribution you see here reflects the specific population who happened to carry the Tasaki surname at the time of the 2020 Census, not any inherent property of the name itself.
- Asian and Pacific Islander79.0% · 79
- Two or more races9.0% · 9
- White8.0% · 8
- Black or African American3.0% · 3
- American Indian and Alaska Native1.0% · 1
Timeline
Historical Census data for Tasaki
Tasaki appears in 3 published Census surname files: 2000, 2010, 2020. The cards below show how the name's rank and bearer count changed across each release.
2010
#147,253
National surname rank
Recorded bearers 112
+8 bearers (+7.7%)
Per 100,000 0.04
Rank movement Down 1,242 places
2020
#155,682
National surname rank
Recorded bearers 100
-12 bearers (-10.7%)
Per 100,000 0.03
Rank movement Down 8,429 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #146,011 | 104 | 0.04 | First available Census row | First available Census row |
| 2010 | #147,253 | 112 | 0.04 | +8 bearers (+7.7%) | Down 1,242 places |
| 2020 | #155,682 | 100 | 0.03 | -12 bearers (-10.7%) | Down 8,429 places |
For 2020, the Census Bureau published race and Hispanic-origin columns as counts rather than percentages. Name Census converts those counts back into shares so the ancestry section stays comparable with the older surname files.
Year on year
2010 vs 2020 Census
How has the Tasaki surname changed between Census years? The chart shows bearer count side by side, and the table compares rank, count, and frequency.
Census year comparison
20102020
| Metric | 2010 | 2020 | Change |
|---|---|---|---|
| Rank | #147,253 | #155,682 | -5.7% |
| Count | 112 | 100 | -10.7% |
| Per 100K | 0.04 | 0.03 | -16.4% |
Between the 2010 and 2020 Census, the number of Tasaki bearers went from 112 to 100 (-10.7% change). The surname moved down 8,429 positions in the national ranking, going from #147,253 to #155,682.
FAQ
Tasaki surname: questions and answers
How many people in the U.S. have the surname Tasaki?
Name Census estimates that about 115 living Americans carry the surname Tasaki. Using the current population baseline, that works out to roughly 1 in 2,980,473 residents.
How common is Tasaki?
Tasaki ranks #155,682 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.03 per 100,000 residents, which is about 0 people out of every 100,000.
How many people with this surname were counted in the Census?
The raw 2020 Census file counted 100 people with the surname Tasaki. That is different from the site's living-bearer estimate (115), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.03 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.03 per 100,000 means that if you picked a random group of 100,000 U.S. residents, you would expect about 0 of them to have the surname Tasaki.
Has Tasaki become more or less common over time?
Between 2010 and 2020, the surname Tasaki went from 112 recorded bearers to 100. That is a decrease of 12 (-10.7%). In the national ranking it fell from #147,253 to #155,682.
What does the Census say about the background of Tasaki?
Among Census respondents with the surname Tasaki, the largest self-reported group is Asian/Pacific Islander at 79.0%. The next largest groups are Two or More Races (9.0%) and White (8.0%). These figures come from the 2020 Census Bureau surname tables, based on how respondents described their own race and ethnicity.
Which group reports this surname most often?
Asian/Pacific Islander is the largest self-reported group for the surname Tasaki in the 2020 Census, accounting for 79.0% (79 people in the source table).
What is the full ancestry breakdown?
Tasaki appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Asian/Pacific Islander (79.0%), Two or More Races (9.0%), White (8.0%). For 2020, the source file also published raw headcounts for each group, which is why this page can show both percentages and counts in the ancestry section.
Is this page using the latest Census data?
Yes. This page is using the latest surname file currently loaded on Name Census, which is 2020. The historical section above also keeps any older Census surname entries we have for Tasaki (2000, 2010, 2020).
Does the Census include every surname?
No. The Census Bureau only publishes surnames that appeared at least 100 times in a given decennial Census. That means very rare surnames are excluded entirely, and a surname can appear in one Census release but disappear from a later one if it falls below the reporting threshold.
Why don't the ancestry percentages always add up to exactly 100%?
There are two main reasons: rounding and suppression. The Census Bureau rounds published values, and it may suppress very small cells to protect privacy. For 2020, the Bureau also published raw group counts rather than direct percentages, so Name Census converts those counts back into shares for comparability across census years.
What does Tasaki mean?
A Japanese surname derived from the words "tasa" (task) and "ki" (tree), possibly referring to someone involved in logging or woodworking. The fuller origin note on this page goes into more detail.
Where does the surname data come from?
All surname statistics on Name Census are drawn from the US Census Bureau's decennial surname frequency tables. These files list every surname that appeared 100 or more times in the 2020 Census, along with a count, a per-100,000 rate, and a self-reported demographic breakdown. You can read the full explanation on our methodology page.
How does Name Census estimate living bearers?
For surnames, Name Census does not age cohorts the way it does for first names. Instead, it takes the Census Bureau's published frequency for Tasaki (0.03 per 100,000) and applies that rate to the current U.S. resident population to estimate how many living Americans have the surname today.
How many people have the last name Tasaki?
See how common the surname Tasaki is on HowManyOfMe.org, our sister site built around that single question.