2000
#75,695
National surname rank
Recorded bearers 237
First available Census row
Per 100,000 0.09
Very Rare Last name
Deguchi
A Japanese surname potentially meaning "exit" or "opening".
According to the 2020 US Census Bureau surname tables, roughly 219 Americans carry the last name Deguchi. That puts it at #100,867 in the national surname ranking, appearing at a frequency of 0.06 per 100,000 people (about 1 in 1,565,088 residents).
This page is the full Name Census profile for the Deguchi 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
219
1 in 1,565,088
Census rank
#100,867
2020 decennial data
Per 100,000
0.1
Frequency rate
Recorded bearers
191
very rare in the US
Popularity narrative
The Census Bureau recorded 191 bearers of the surname Deguchi in its 2020 decennial surname file. At a rate of 0.06 per 100,000 residents, it holds the 100867th position in the national surname ranking.
Among Census respondents with the surname Deguchi, the largest self-reported group is Asian/Pacific Islander at 69.1%. The next largest groups are Two or More Races (11.5%) and Hispanic (11.0%).
Origin
Meaning and origin of Deguchi
The surname Deguchi originates from Japan, with its earliest known roots dating back to the 16th century. It is believed to have derived from the Japanese words "de," meaning "emergence" or "exit," and "guchi," meaning "mouth" or "entrance." This combination suggests a connection to a particular location or geographical feature, such as a village or town situated near an exit or entrance point.
One of the earliest documented references to the Deguchi name can be found in the Edo Period (1603-1868) records of the Tokugawa Shogunate. During this time, the Deguchi family likely resided in the Kansai region of central Japan, particularly in the areas around modern-day Osaka and Kyoto.
In the late 17th century, a notable figure named Deguchi Norikata (1630-1711) gained prominence as a skilled swordsman and martial artist. He hailed from the Deguchi clan and is credited with contributing to the development of the Shinkage-ryu school of swordsmanship.
Another prominent individual with the Deguchi surname was Deguchi Onisaburo (1876-1935), a Japanese entrepreneur and industrialist. He founded the Deguchi Textile Company, which played a significant role in the economic growth of the Meiji and Taisho periods.
In the realm of literature, Deguchi Tetsuro (1908-1992) was a celebrated author and poet. His works, such as "The Bamboo Grove" and "Autumn Wind," explored themes of nature, tradition, and the human condition. Deguchi Tetsuro's literary contributions earned him numerous accolades and recognition within Japan's literary circles.
During the Edo Period, the Deguchi family's influence extended to the realm of traditional Japanese theater. Deguchi Yasaburo (1720-1786) was a renowned Kabuki actor and playwright, renowned for his performances in plays like "The Love Suicides at Sonezaki" and "The Crest Piercing Spear."
Throughout its history, the Deguchi surname has been associated with various professions, from samurai warriors and entrepreneurs to artists and writers. While these examples provide a glimpse into the diverse backgrounds of individuals bearing this name, the Deguchi lineage undoubtedly has a rich and multifaceted history deeply rooted in Japanese culture and society.
Demographics
Ancestry and ethnicity for Deguchi
Among Census respondents with the surname Deguchi, the largest self-reported group is Asian/Pacific Islander at 69.1%. The next largest groups are Two or More Races (11.5%) and Hispanic (11.0%).
The bar chart below shows how Deguchi 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 Deguchi surname at the time of the 2020 Census, not any inherent property of the name itself.
- Asian and Pacific Islander69.1% · 132
- Two or more races11.5% · 22
- Hispanic or Latino11.0% · 21
- White8.4% · 16
Timeline
Historical Census data for Deguchi
Deguchi 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
#77,788
National surname rank
Recorded bearers 246
+9 bearers (+3.8%)
Per 100,000 0.08
Rank movement Down 2,093 places
2020
#100,867
National surname rank
Recorded bearers 191
-55 bearers (-22.4%)
Per 100,000 0.06
Rank movement Down 23,079 places
| Year | Rank | Count | Per 100K | Count change | Rank change |
|---|---|---|---|---|---|
| 2000 | #75,695 | 237 | 0.09 | First available Census row | First available Census row |
| 2010 | #77,788 | 246 | 0.08 | +9 bearers (+3.8%) | Down 2,093 places |
| 2020 | #100,867 | 191 | 0.06 | -55 bearers (-22.4%) | Down 23,079 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 Deguchi 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 | #77,788 | #100,867 | -29.7% |
| Count | 246 | 191 | -22.4% |
| Per 100K | 0.08 | 0.06 | -20.1% |
Between the 2010 and 2020 Census, the number of Deguchi bearers went from 246 to 191 (-22.4% change). The surname moved down 23,079 positions in the national ranking, going from #77,788 to #100,867.
FAQ
Deguchi surname: questions and answers
How many people in the U.S. have the surname Deguchi?
Name Census estimates that about 219 living Americans carry the surname Deguchi. Using the current population baseline, that works out to roughly 1 in 1,565,088 residents.
How common is Deguchi?
Deguchi ranks #100,867 in the 2020 Census surname tables and is classified on this site as "Very Rare." The Census recorded the name at a frequency of 0.06 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 191 people with the surname Deguchi. That is different from the site's living-bearer estimate (219), which projects the surname's present-day count by applying the Census frequency rate to the current U.S. population.
What does 0.06 per 100,000 actually mean?
It is the Census Bureau's normalized frequency measure. A rate of 0.06 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 Deguchi.
Has Deguchi become more or less common over time?
Between 2010 and 2020, the surname Deguchi went from 246 recorded bearers to 191. That is a decrease of 55 (-22.4%). In the national ranking it fell from #77,788 to #100,867.
What does the Census say about the background of Deguchi?
Among Census respondents with the surname Deguchi, the largest self-reported group is Asian/Pacific Islander at 69.1%. The next largest groups are Two or More Races (11.5%) and Hispanic (11.0%). 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 Deguchi in the 2020 Census, accounting for 69.1% (132 people in the source table).
What is the full ancestry breakdown?
Deguchi appears across multiple self-reported groups in the Census data. The largest shares in the 2020 file are Asian/Pacific Islander (69.1%), Two or More Races (11.5%), Hispanic (11.0%). 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 Deguchi (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 Deguchi mean?
A Japanese surname potentially meaning "exit" or "opening". 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 Deguchi (0.06 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 common is the surname Deguchi?
For a quick modern take, check how many people are called Deguchi on our sister site HowManyOfMe.org.