Yes, most hotel room reservations are refundable provided that you cancel prior to the accommodation's cancellation deadline, which often is within 24-48 hours of your scheduled arrival. If your reservation is non-refundable, you might be able to cancel it and be given a refund within a 24-hour period of your booking. Plug in your dates, click on "Search", then you can filter by "fully refundable" to view the best deals available near Japanese Memorial Peace Park.