S-K 1603(a)(9) Restrictions on Selling Securities	Mar. 03, 2026
SPAC Sponsor and Affiliates Information, Restrictions on Sale of SPAC Securities [Line Items]
SPAC Sponsor, Persons and Entities Subject to Restrictions	Mehana Ventures LLC [___]
SPAC Sponsor, Terms That Would Result in Earlier Expiration of Restrictions [Text Block]	Up to 964,286 of the founder shares will be surrendered for no consideration depending on the extent to which the underwriters’ over-allotment option is exercised. In addition, in order to facilitate our initial business combination as determined by our sponsor in its sole discretion, our sponsor may surrender or forfeit, transfer or exchange our founder shares, private placement units or any of our other securities, including for no consideration, as well as subject any such securities to earn-outs or other restrictions, or otherwise amend the terms of any such securities or enter into any other arrangements with respect to any such securities. We may also issue Class A ordinary shares upon conversion of the Class B ordinary shares at a ratio greater than one-to-one at the time of our initial business combination as a result of the anti-dilution provisions as set forth therein. Pursuant to the letter agreement to be entered with us, each of our sponsor, directors and officers have agreed to a lock-up and restrictions on their ability to transfer, assign, or sell the founder shares and private placement units and securities underlying the private placement units. Further, the sponsor membership interests (including the interests held by the non-managing members) are locked up and not transferable because the letter agreement prohibits indirect transfers. Our letter agreement may be amended without shareholder approval. Such transfer restrictions have been amended in connection with business combinations for certain other special purpose acquisition companies. While we do not expect our board to approve any amendment to the letter agreement prior to our initial business combination, it may be possible that our board, in exercising its business judgment and subject to its fiduciary duties, chooses to approve one or more amendments to the letter agreement.
Founder Shares [Member]
SPAC Sponsor and Affiliates Information, Restrictions on Sale of SPAC Securities [Line Items]
SPAC Sponsor, Description of Expiration Dates of Restrictions [Text Block]	The earlier of (A) six months after the completion of our initial business combination and (B) the date following the completion of our initial business combination on which we complete a liquidation, merger, share exchange or other similar transaction that results in all of our shareholders having the right to exchange their Class A ordinary shares for cash, securities or other property.
SPAC Sponsor, Persons and Entities Subject to Restrictions	Mehana Ventures LLC
SPAC Sponsor, Description of Exceptions to Restrictions [Text Block]	Transfers permitted (a) to our officers, directors, advisors or consultants, any affiliate or family member of any of our officers, directors, advisors or consultants, any members or partners of the sponsor or their affiliates and funds and accounts advised by such members or partners, any affiliates of the sponsor, or any employees of such affiliates; (b) in the case of an individual, as a gift to such person’s immediate family or to a trust, the beneficiary of which is a member of such person’s immediate family, an affiliate of such person or to a charitable organization; (c) in the case of an individual, by virtue of laws of descent and distribution upon death of such person; (d) in the case of an individual, pursuant to a qualified domestic relations order; (e) by private sales or transfers made in connection with any forward purchase agreement or similar arrangement, in connection with an extension of the completion window or in connection with the consummation of a business combination at prices no greater than the price at which the shares or Share Rights were originally purchased; (f) pro rata distributions from our sponsor to its respective members, partners or shareholders pursuant to our sponsor’s limited liability company agreement or other charter documents; (g) by virtue of the laws of the Cayman Islands or our sponsor’s limited liability company agreement upon dissolution of our sponsor; (h) in the event of our liquidation prior to our consummation of our initial business combination; (i) in the event that, subsequent to our consummation of an initial business combination, we complete a liquidation, merger, share exchange or other similar transaction which results in all of our shareholders having the right to exchange their Class A ordinary shares for cash, securities or other property; or (j) to a nominee or custodian of a person or entity to whom a transfer would be permissible under clauses (a) through (g); provided, however, that in the case of clauses (a) through (g) and clause (j) these permitted transferees must enter into a written agreement agreeing to be bound by these transfer restrictions and the other restrictions contained in the letter agreement.
Private Placement Units [Member]
SPAC Sponsor and Affiliates Information, Restrictions on Sale of SPAC Securities [Line Items]
SPAC Sponsor, Description of Expiration Dates of Restrictions [Text Block]	30 days after the completion of our initial business combination
SPAC Sponsor, Persons and Entities Subject to Restrictions	Mehana Ventures LLC [___]
SPAC Sponsor, Description of Exceptions to Restrictions [Text Block]	Same as above
Units, Warrants, Ordinary Shares [Member]
SPAC Sponsor and Affiliates Information, Restrictions on Sale of SPAC Securities [Line Items]
SPAC Sponsor, Description of Exceptions to Restrictions [Text Block]	We, our sponsor and our officers and directors have agreed that, for a period of 180 days from the date of this prospectus, we and they will not, without the prior written consent of the representative of the underwriters, offer, sell, contract to sell, pledge or otherwise dispose of, directly or indirectly, any units, Share Rights, shares or any other securities convertible into, or exercisable, or exchangeable for, shares, subject to certain exceptions. The representative in its sole discretion may release any of the securities subject to these lock-up agreements at any time without notice, other than in the case of the officers and directors, which shall be with notice. Our sponsor, officers and directors are also subject to separate transfer restrictions on their founder shares and private placement units pursuant to the letter agreement described in the immediately preceding paragraphs.
Units, Share Rights, ordinary shares [Member]
SPAC Sponsor and Affiliates Information, Restrictions on Sale of SPAC Securities [Line Items]
SPAC Sponsor, Description of Expiration Dates of Restrictions [Text Block]	180 days from the date of this prospectus

Pono Capital Four, Inc. S-1/A