Hawaii Adverse Possession (Squatters' Rights)

HRS § 657-31 sets the baseline period: 'No person shall commence an action to recover possession of any lands, or make any entry thereon, unless within twenty years after the right to bring the action first accrued.' HRS § 657-31.5 then sharply restricts modern claims: a person may claim adverse possession only 'if the real property which is the subject of the action is five acres or less' and 'the person claiming by adverse possession has not asserted any similar claim, in good faith, within the past twenty years,' excluding claims made before November 7, 1978. A grandfather clause preserves claims completing twenty years before that date. The possessor must still prove open, notorious, hostile, continuous, and exclusive possession.

No specific statutory penalty. A squatter on a parcel larger than five acres (post-1978) or who recently made a similar claim cannot acquire title; the record owner may recover possession through an ejectment or quiet-title action within the 20-year window.