Light, brightness, or star
Kosei is a Japanese masculine name with multiple meanings depending on the kanji used. Common interpretations include 'light' or 'brightness' (光星) and 'navigation star' (航星). It is a modern-sounding name in Japan that balances celestial imagery with a sense of clarity.
Fewer than 5 boys were named Kosei in 2025.
US births per 5-year period, 1990–present (SSA data).
The protagonist and piano prodigy · Your Lie in April
Olympic gold medalist judoka
Professional world champion boxer
Professional football player
