UK boy's name
Seiji
A masculine Japanese name meaning "accomplished" or "composed".
For 2026, the newest official UK baby-name figures on this page are from 2013. That release is the current official benchmark rather than a forecast.
Seiji is a boy's name in the UK records. People looking for Seiji popularity in 2026 should use the latest official release, which is 2013 in this profile. In that release it ranked #4685, with 3 babies registered with the name. Its strongest year in the published records was 2012, with 3 births.
This profile covers 6 England and Wales registrations across 2 recorded years from 2012 to 2013. The figures come from ONS England and Wales, so the page is a view of published baby-name registrations rather than a forecast or a live count of people using the name today.
The latest count is about 100% of the recorded peak, which gives a quick read on how the name has moved since its high point.
We estimate that about 6 living people in the UK are called Seiji. This uses published birth registrations from England and Wales, Scotland and Northern Ireland, then applies ONS national life tables to estimate how many are likely still alive. It does not forecast extra births for 2014 or 2026.
Key insights
- • Seiji ranked #4685 for boys in England and Wales in 2013, with 3 registrations.
- • The name peaked in 2012, when 3 boys were registered as Seiji.
- • About 6 living people in the UK are estimated to have Seiji as a first name, after adjusting past birth registrations with ONS life tables.
Latest rank (E&W)
#4685
2013
Births in 2013
3
Latest year
Peak year
2012
3 births
Estimated living
6
2026
Meaning
What does Seiji mean?
The given name Seiji has its origins in Japan, where it has been used for centuries. The name is composed of two Japanese kanji characters: "sei" meaning "truth" or "sincerity," and "ji" meaning "child" or "son." Together, the name Seiji can be interpreted as "sincere child" or "truthful son."
In ancient Japan, the name Seiji was often given to boys as a symbolic wish for them to grow up with honesty and integrity. It was a popular choice among samurai families and the nobility, who placed great importance on values such as honor and truthfulness.
One of the earliest recorded bearers of the name Seiji was Seiji Tōgō (1836-1919), a prominent Japanese admiral who played a crucial role in the Russo-Japanese War of 1904-1905. His decisive victory at the Battle of Tsushima is considered one of the greatest naval battles in modern history.
Another notable figure in Japanese history with the name Seiji was Seiji Nagai (1886-1951), a Christian philosopher and author who survived the atomic bombing of Nagasaki in 1945. His book "The Bells of Nagasaki" recounts his experiences during the bombing and his efforts to help the survivors.
In the realm of literature, Seiji Tsutsumi (1927-1991) was a renowned Japanese novelist and playwright. His works often explored themes of social injustice and human resilience. He received numerous literary awards, including the Akutagawa Prize and the Naoki Prize.
The name Seiji has also been borne by influential figures in Japanese politics and business. Seiji Ozawa (born 1935) is a celebrated conductor and former music director of the Boston Symphony Orchestra. His contributions to classical music have earned him numerous accolades, including a Grammy Award.
Another notable bearer of the name was Seiji Natsume (1923-2005), a Japanese businessman who served as the chairman and CEO of Sony Corporation. Under his leadership, Sony became a global electronics powerhouse and a symbol of Japanese innovation and technological prowess.
While the name Seiji has its roots in Japan, it has also gained popularity in other parts of the world, particularly among individuals with Japanese ancestry or those with an appreciation for Japanese culture and values.
Sourced from namecensus.com.
Popularity
Seiji over time
The chart below shows babies named Seiji registered in England and Wales in the years where the name appears in the published records, from 2012 to 2013. Empty years are left out so rare names are not stretched across long periods where the published files do not show any registrations.
For Seiji, the clearest high point is 2012. The latest England and Wales figure is 3 births in 2013, compared with 3 at the peak.
Babies born per year
Decades
Seiji by decade
Decade totals smooth out the yearly jumps and make it easier to see whether Seiji was a short-lived spike or a name that stayed in regular use. Average rank is calculated only from years where a published rank exists.
| Decade | Average rank | Total births | Years covered |
|---|---|---|---|
| 2010s | #4745 | 6 | 2 |
Related
Names similar to Seiji
- Samuel 108,505
- Sebastian 33,008
- Sam 20,889
- Stanley 16,354
- Sonny 15,028
- Sean 15,006
- Scott 12,587
- Seth 9,841
- Syed 9,050
- Stephen 8,884
- Spencer 8,333
- Steven 6,970
FAQ
Seiji: questions and answers
How popular is the name Seiji in the UK right now?
In 2013, Seiji was ranked #4685 for boys in England and Wales, with 3 births registered.
When was Seiji most popular?
The peak year on record was 2012, with 3 babies registered as Seiji in England and Wales.
What is the meaning and origin of Seiji?
A masculine Japanese name meaning "accomplished" or "composed".
How many people are called Seiji in the UK?
A total of 6 babies have been registered as Seiji across the 2 years of ONS England & Wales records shown here.
Which records is this page based on?
The England and Wales timeline uses ONS baby-name records. Scotland figures come from NRS and Northern Ireland figures come from NISRA. Counts are registrations in published baby-name files. The living estimate uses those birth registrations with ONS national life tables.