Haw. Rev. Stat. § 621-1: Subpoena, issue of.

The clerks of the several courts shall issue writs of subpoena as provided by the rules of court or by statute. Except as otherwise provided, the clerks shall issue to any prosecuting officer, and to any party plaintiff or defendant, in any cause, civil or criminal, pending before such courts, or to the counsel of the party, writs of subpoena for witnesses, in blank, so that the names of the witnesses to be summoned may be inserted after the issuing of the writs.