Hawaii Revised Statutes Division 4. Courts and Judicial Proceedings § 607-12

[(a)] The fees of witnesses shall be as follows: Every witness attending and testifying, or subpoenaed and attending, upon the trial of any civil cause, in any court, shall be paid the sum of $4 for each day's attendance in court, and traveling expenses at the rate of 20 cents a mile each way. Every such witness, coming to attend upon court from any island other than that upon which the court is holding session, shall be entitled to $6 for each day's attendance in addition to the actual round trip cost of plane or ship travel and 20 cents for each mile actually and necessarily traveled on the ground each way.

[(b)] The fees of witnesses may be taxed in the bill of costs as provided by section 607-9.