Ohio Rev. Code § 2151.08
In Hamilton county, the powers and jurisdiction of the juvenile court as conferred by Chapters 2151. and 2152. of the Revised Code shall be exercised by the judge of the court of common pleas whose term begins on January 1, 1957, and that judge's successors and by the judge of the court of common pleas whose term begins on February 14, 1967, and that judge's successors as provided by section 2301.03 of the Revised Code. This conferral of powers and jurisdiction on the specified judges shall be deemed a creation of a separately and independently created and established juvenile court in Hamilton county, Ohio. The specified judges shall serve in each and every position where the statutes permit or require a juvenile judge to serve.
R.C. §2151.08