Rising since 2021, #10,695 for boys today.
Popularity of Kaisei since 2005
Babies named Kaisei per year in U.S. Social Security records. Raw births topped out in 2007, but relative to how few babies were recorded back then, Kaisei's real moment was 2024.
Data table (by decade)
| Decade | Boys |
|---|---|
| 2000s | 33 |
| 2010s | 70 |
| 2020s | 34 |
Meaning & origin
Kaisei first entered U.S. birth records in 2005, and by 2025 it ranked 10,695th, with approximately 1 in every 284,679 newborns receiving the name. Its peak year so far is 2024, and it has been on a rising trajectory since 2021, indicating a small but growing niche for this Japanese name among American parents. While top states data is not available, the name's cultural origin ties it to Japan, and it is likely most common in communities with Japanese heritage. As a modern adaptation with variable kanji meanings, Kaisei represents a style of cross-cultural naming that appeals to parents seeking a distinctive, internationally influenced choice.
Kaisei is a Japanese name that can be written with various kanji combinations, often using 海 (kai, 'sea') and 星 (sei, 'star') or 生 (sei, 'life'). It does not have a single well-attested meaning, as the interpretation depends on the chosen kanji. The name has gained some use in the United States since the 2000s, particularly in Hawaii and the West Coast, possibly influenced by Japanese culture.
Sibling names for Kaisei
Names that share Kaisei's style, for a brother or sister.
