It is said that the name 'Chushojima' was generated because Yasuharu WAKIZAKA, who worked at Nakatsukasasho (Ministry of Central Affairs) in the Bunroku era (1593 - 1596), built a house on an island surrounded by a branch river of the Yodo-gawa River and lived there.
文禄年間、中務省の職にあった脇坂安治が淀川の分流に囲まれた島に屋敷を建て住んだことから「中書島」の名前が生まれたとされる。