Meaning: かさいn. (Kanji=果菜) fruits and vegetablesn. (Kanji=火災) conflagration, fire, large fire which causes great destructionn. (Kata=カサイ, Kanji=笠井) Kasai, Japanese family namen. (Kata=カサイ, Kanji=葛西) Kasai, Japanese family namen. (Kata=カサイ, Kanji=河西) Kasai, Japanese family name