Hawaii Revised Statutes Division 1. Government § 386-81

(1) The employer or the employer's agent in charge of the work in the place where the injury was sustained had knowledge of the injury;

(2) Medical, surgical, or hospital service and supplies have been furnished to the injured employee by the employer; or

(3) For some satisfactory reason the notice could not be given and the employer has not been prejudiced by such failure.

Unless the employer is prejudiced thereby notice of injury shall be deemed to have been waived by the employer if objection to the failure to give such notice is not raised at the first hearing on a claim in respect of such injury of which the employer is given reasonable notice and opportunity to be heard.