Every park is different. Visiting Tokyo is a great idea. Admission is quite cheap. The biggest difference is they’re a cash economy so credit cards can’t be used. A tourist can’t reserve the famous Tokyo Disneyland restaurants using an American credit card since it cannot be accepted there. Wait in line. Upon arrival at hotel, pay for all reserved rooms in advance with Japanese yen. That’s why I brought $2000 worth of yen to pay for everything once I’m there. Buy all tickets at home if you can. That’ll save you from having to bring more cash.