Kosei as a Baby Name. Meaning and Origin of Kosei

What is the meaning of the name Kosei ?

The baby name Kosei is a Male name , 2 syllables long and is pronounced KOH-say (English approx.), IPA: /koːseɪ/; Japanese: [ko.se.i].

Kosei is Japanese in Origin.

Kosei is a Japanese masculine given name, pronounced KOH-say, whose meaning depends on the kanji chosen. Parents select characters to shape nuance; common writings include 康生 “healthy life,” 公正 “fairness/justice,” 厚生 “welfare, well-being,” 恒星 “fixed star,” 輝星 “shining star,” 航世 “navigating the world,” and 光誠 “light and sincerity.” This flexibility lets Kosei evoke ideals from integrity to vitality or celestial brightness.

Use is documented throughout the 20th century, with sharp growth since the 1990s amid the popularity of -sei names. It is well known through athletes such as judoka Kosei Inoue (井上康生), boxer Kosei Tanaka (田中恒成), and pitcher Kosei Yoshida (吉田輝星). Romanization varies: Kōsei (with macron) and Kousei are standard alternatives to Kosei; the name is rarely unisex but predominantly male. Related forms built on -sei include Yūsei and Ryūsei, while kana spellings こうせい/コウセイ avoid fixing a single meaning.