Ohio Rev. Code Ann. § 2305.111
(A) As used in this section:
(1) "Childhood sexual abuse" means any conduct that constitutes any of the violations identified in division (A)(1)(a) or (b) of this section and would constitute a criminal offense under the specified section or division of the Revised Code, if the victim of the violation is at the time of the violation a child under eighteen years of age or a child with a developmental disability or physical impairment under twenty-one years of age. The court need not find that any person has been convicted of or pleaded guilty to the offense under the specified section or division of the Revised Code in order for the conduct that is the violation constituting the offense to be childhood sexual abuse for purposes of this division. This division applies to any of the following violations committed in the following specified circumstances:
(b) A violation of section 2907.05 or 2907.06 of the Revised Code if, at the time of the violation, any of the following apply:
(B) Except as provided in section 2305.115 of the Revised Code and subject to division (C) of this section, an action for assault or battery shall be brought within one year after the cause of the action accrues. For purposes of this section, a cause of action for assault or battery accrues upon the later of the following:
(2) If the plaintiff did not know the identity of the person who allegedly committed the assault or battery on the date on which it allegedly occurred, the earlier of the following dates: