Sekai
Boy name · #2445 in 2025 · Very rare
Sekai is currently the #2445 boy name in the United States — 56 babies received it in 2025. A decade ago it stood at #12086, so the name has been rising over the past ten years. Roughly one in every 32,143 boys born in 2025 was named Sekai.
The 24-year story
Sekai first appears in the Social Security records in 2001, when 7 boys received the name. Its all-time peak is essentially right now: 2025, with 56 babies and a rank of #2421. Names at their peak can keep climbing — or be one trend cycle from the long slide that eventually hits most popular names. Following the curve matters more than today's snapshot: a name's position on its rise-peak-decline arc is the best predictor of how common it will feel in a kindergarten class five years from now.
Babies named Sekai per year. Source: SSA.
Unlock the 5-year forecast and compare Sekai against up to 5 other names.
Uniqueness: will there be another Sekai in class?
On our rarity read — which blends how common Sekai is today with its five-year momentum — the name reads as "very rare". A high score means genuine rarity — your Sekai will likely be the only one in the room, with the occasional spelling-out as the price.
Where Sekai is most common
State-level data for Sekai is too sparse in 2025 to rank by rate — in most states its count falls below the SSA's per-state reporting threshold (counts under 5 are withheld).
Names like Sekai
Statistically, parents drawn to Sekai tend to be choosing among names with similar popularity arcs, era profiles, and sounds — the closest matches in our model are Sakai, Rakai, Xakai, Dakai, and Elikai.
SakaiRakaiXakaiDakaiElikaiZakkaiAlakaiJahkai
Rank history (last 25 years)
| Year | Babies named Sekai | Rank |
|---|---|---|
| 2025 | 56 | #2421 |
| 2024 | 37 | #3216 |
| 2023 | 41 | #3005 |
| 2022 | 30 | #3691 |
| 2021 | 12 | #6698 |
| 2020 | 9 | #8067 |
| 2019 | 10 | #7643 |
| 2017 | 10 | #7546 |
| 2016 | 9 | #8146 |
| 2015 | 5 | #12086 |
| 2012 | 6 | #10770 |
| 2011 | 6 | #10808 |
| 2010 | 7 | #9693 |
| 2009 | 12 | #6802 |
| 2008 | 6 | #11037 |
| 2006 | 5 | #12055 |
| 2005 | 10 | #7096 |
| 2003 | 6 | #9581 |
| 2001 | 7 | #8339 |
Frequently asked questions
Is Sekai a popular boy name?
Sekai ranked #2445 among boys in 2025 with 56 babies given the name — outside the top 500, making it an uncommon pick. Ten years earlier it ranked #12086.
When was the name Sekai most popular?
Sekai peaked in 2025, when 56 American boys received the name (ranked #2421 that year). That peak is current — the name is at or near its all-time high right now.
How rare is the name Sekai?
In 2025, roughly 1 in 32,143 newborn American boys was named Sekai. On our rarity scale (rarity blended with momentum) we classify it as "very rare".
Data source: U.S. Social Security Administration name statistics, 1880–2025, national and state files. Counts reflect Social Security card applications; names with fewer than 5 occurrences in a state-year are suppressed by the SSA.