10 days japan visit

hi, would it be better to get a 7 day rail pass or single tickets to our itinerary?2 adults and 1 child(4 yrs old)

march 29- arrive 8:00pm to osaka int'l airport(check in at umeda distict hotel)
march 30- kyoto/nara then back to osaka
march 31- universal studios
april 1- osaka city and if possible side trip to himeji
april 2- travel to tokyo( check in at Tokyo Disney Resort / Makuhari, Tokyo, Japan)
april 3- disneyland
april 4- disney sea
april 5 - check in at shinagawa
april 6- city tour
april 7- either mt fuji or city tour
april 8-flight departure from narita airport

thanks a lot