UK boy's name
Kasai
From Japanese origins, a name referencing a blaze or wildfire.
For 2026, the newest official UK baby-name figures on this page are from 2024. That release is the current official benchmark rather than a forecast.
Kasai is a boy's name in the UK records. People looking for Kasai popularity in 2026 should use the latest official release, which is 2024 in this profile. In that release it ranked #3254, with 6 babies registered with the name. Its strongest year in the published records was 2024, with 6 births.
This profile covers 12 England and Wales registrations across 3 recorded years from 2020 to 2024. 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.
Kasai is at its recorded peak in the England and Wales series.
We estimate that about 12 living people in the UK are called Kasai. 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 2025 or 2026.
Key insights
- • Kasai ranked #3254 for boys in England and Wales in 2024, with 6 registrations.
- • The name peaked in 2024, when 6 boys were registered as Kasai.
- • About 12 living people in the UK are estimated to have Kasai as a first name, after adjusting past birth registrations with ONS life tables.
Latest rank (E&W)
#3254
2024
Births in 2024
6
Latest year
Peak year
2024
6 births
Estimated living
12
2026
Meaning
What does Kasai mean?
The given name Kasai has its origins in Japanese culture, where it is a combination of two distinct words: "ka" meaning "fire" and "sai" meaning "talent" or "genius." Together, the name can be interpreted as "a talented or gifted person with a fiery spirit."
The earliest recorded use of the name Kasai dates back to the Heian period (794-1185 CE) in Japan, when it was primarily used for males. During this time, the name was closely associated with the samurai warrior class, as it embodied the qualities of bravery, strength, and unwavering determination that were highly valued by these skilled warriors.
In ancient Japanese literature, the name Kasai appears in several texts, including the "Tale of the Heike," an epic narrative that chronicles the struggle between the Taira and Minamoto clans for control of Japan in the late 12th century. One notable figure bearing this name was Kasai Masahiro (1564-1622), a renowned samurai and military strategist who served under the powerful Tokugawa shogunate.
As Japan entered the Edo period (1603-1868), the name Kasai continued to be favored among the nobility and samurai class. During this era, Kasai Yoshitaka (1652-1703) rose to prominence as a skilled calligrapher and poet, renowned for his mastery of traditional Japanese arts.
In more recent history, Kasai Zenzō (1887-1928) was a prominent Japanese painter and printmaker who is celebrated for his woodblock prints depicting traditional Japanese landscapes and scenes from daily life. His works are considered masterpieces of the Ukiyo-e art form and are highly sought after by collectors worldwide.
Another notable figure named Kasai is Kasai Masaru (1918-2008), a Japanese engineer who made significant contributions to the development of the bullet train, or Shinkansen. His innovative designs and technical expertise played a crucial role in establishing Japan's renowned high-speed rail network, which revolutionized transportation in the country.
While the name Kasai has its roots in Japanese culture, it has also gained recognition and popularity in other parts of the world, particularly among those with an appreciation for Japanese history and traditions.
Sourced from namecensus.com.
Popularity
Kasai over time
The chart below shows babies named Kasai registered in England and Wales in the years where the name appears in the published records, from 2020 to 2024. Empty years are left out so rare names are not stretched across long periods where the published files do not show any registrations.
For Kasai, the clearest high point is 2024. The latest England and Wales figure is 6 births in 2024, compared with 6 at the peak.
Babies born per year
Decades
Kasai by decade
Decade totals smooth out the yearly jumps and make it easier to see whether Kasai 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 |
|---|---|---|---|
| 2020s | #4217 | 12 | 3 |
Related
Names similar to Kasai
- Kieran 30,429
- Kyle 28,463
- Kai 24,432
- Kian 17,666
- Kayden 8,305
- Kevin 7,927
- Kane 7,149
- Kaiden 5,762
- Kieron 4,547
- Kacper 4,366
- Kye 4,012
- Kit 3,529
FAQ
Kasai: questions and answers
How popular is the name Kasai in the UK right now?
In 2024, Kasai was ranked #3254 for boys in England and Wales, with 6 births registered.
When was Kasai most popular?
The peak year on record was 2024, with 6 babies registered as Kasai in England and Wales.
What is the meaning and origin of Kasai?
From Japanese origins, a name referencing a blaze or wildfire.
How many people are called Kasai in the UK?
A total of 12 babies have been registered as Kasai across the 3 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.