Looks like this includes some pretty nice properties. Sale goes live at 16:00 AEST for 72 hours.
Need to be a Hhonors member (free to join)
T&C:
Limited availability at the discounted rates. Offer is subject to availability at all participating properties in the Hilton portfolio across Japan, South Korea, Guam, and Hong Kong for stays booked between 26 November 2019 (14:00 JST / 05:00 GMT) and 29 November 2019 (14:00 JST / 05:00 GMT). Stay must be completed between 26 November 2019 and 30 June 2020. Blackout dates may apply and vary by property. Rates are valid for single/double occupancy and are exclusive of all taxes, incidental charges, gratuities, and resort fees where applicable. Discount is 40% off Flexible Rate (BAR) or Breakfast Included Rate (B&B) across all participating properties. Hilton Honors members will receive an additional 10% discount. Hilton Honors Membership is required to book the Hilton Honors Members rate.
BAR and B&B are specific rate types that vary depending on time of purchase, are unrestricted, non-qualified and excludes discount rates. Full non-refundable prepayment required at time of booking. Your credit card will be charged immediately for the total amount quoted for the entire stay as reserved and refunds or credits will not be issued unless otherwise indicated by local law. Charges cannot be applied to other stays, services or merchandise. Booking cannot be changed.
This offer may not be combined with other select promotions, offer or discounts and is not valid for existing reservations or groups. Offer components are non-transferrable or redeemable for cash, and cannot be used during future stays.
Hilton Honors membership, including the earning and redemption of Points is subject to Hilton Honors Terms & Conditions.
Australian page for the deal (The linked one is to the Japanese page):
https://bit.ly/2DiH09Y