一生

一生, meaning "life", may refer to:


 * Issei, Japanese masculine given name
 * Kazuki, Japanese masculine given name
 * Kazuki Sakai (阪井 一生, born 1985), Japanese guitar in the band Flumpool
 * Kazuo, Japanese masculine given name
 * Kazuo Mori (森 一生, 1911 – 1989), Japanese film director