凱歌[gaika] victory song
凱旋[gaisen] triumphal return
凱旋軍[gaisengun] returning victorious army
凱旋門[gaisenmon] arch of triumph

凱風[gaifuu] southerly wind
凱旋将軍[gaisenshougun] triumphant general
凱旋公演[gaisenkouen] performance given after a successful tour abroad