MModern Japanesemodern
Kosei is a masculine name of Modern Japanese origin. Kosei is associated with a modern aesthetic.
Last reviewed · 2026-05-19
Chapter 01 / 05
What does Kosei mean?
Kosei means an older, unattested meaning and comes from Modern Japanese origin.
osei carries a gentle and rhythmic sound, characterized by its two syllables and smooth flow. It's reminiscent of names like Keiko and Koji, evoking a contemporary, yet intriguing feel.
Chapter 02 / 05
How does Kosei sound?
Chapter 03 / 05
How popular is Kosei?
In 2026, Kosei sits outside the U.S. SSA top-1000 chart, with 145 years of historical data on record.
Chapter 04 / 05
What names are similar to Kosei?
Chapter 05 / 05
About the name Kosei
- What does the name Kosei mean?
- Kosei means an unattested or ambiguous historical meaning and comes from Modern Japanese origin.
- Where does the name Kosei come from?
- Kosei traces to a Modern Japanese origin and continues to appear in U.S. SSA records.
- How popular is the name Kosei?
- Kosei currently sits outside the U.S. SSA top-1000 chart in 2026.
- Is Kosei a boy or girl name?
- Kosei is most commonly used as a masculine name.