Greetings from Hilton Tokyo Bay and thank you for your inquiry. We are an official hotel and guests who stay with us are guaranteed puchase of passports on any day. Passports are available for purchase at our hotel upon your check-in or at any time during your stay. Passports can be used in 1 park per day for the first 2 days so you will need to specify which park to visit on which day at time of purchase. For further questions and assistance, please do not hesitate to contact our hotel directly. We look forward to welcoming you in the near future. Hilton Tokyo Bay