Meaning: さかいn. (Alt=きょう, Kanji=境) border, boundary; abutment; frontier; province, region, districtn. (Kata=サカイ, Kanji=酒井) Sakai, Japanese family namen. (Kata=サカイ, Kanji=坂井) Sakai, Japanese family namen. (Kata=サカイ, Kanji=境) Sakai, Japanese family namen. (Kata=サカイ, Kanji=堺) Sakai, Japanese family name; city in the Japanese prefecture Osaka