The upcoming new ticket system will almost completely do away with separate tickets for separate areas, with a total of three different ticket classes, the Ghibli Park Stroll Ticket, Ghibli Park Big Stroll ticket, and Ghibli Park Premium Big Stroll Ticket.
The Big Stroll Ticket gets you into all five sections of Ghibli Park, including Ghibli’s Grand Warehouse, and grants you eligibility to spend money in shops, restaurants, the Valley of Witches rides, and the Mononoke mochi-roasting activity.
As mentioned above, to see everything currently at Ghibli Park costs 4,500/5,000 yen for adults and 2,250/2,500 yen for kids, so the Ghibli Park Premium Big Stroll Ticket represents a substantial jump in cost.
Like the Ghibli Museum in Tokyo, advance reservations are required for Ghibli Park tickets.