Universal Studios is divided into 8 zones:

The Hollywood zone is the first one you’ll enter as soon as you pass through the gates. You’ll find yourself in the main arcade first. This is a shopping and dining zone.

Just past the entrance to Hollywood Dream The Ride, you will find the entrance to Universal Wonderland. This section of the park is best for kids ages three to seven, but plenty of older kids and adults also seem to enjoy this place.

The main attractions here are Harry Potter and the Forbidden Journey, which is a ride that takes you through the world of Harry Potter, and the Hippogriff, which is a “family-friendly” roller coaster. Note that you can walk through Hogwarts Castle without going on any of the rides.

After leaving the Wizarding World of Harry Potter, you’ll soon see Amity Village on your right. This is home to the famous Jaws ride, which USJ describes as “a boat ride of fear.”

Directly next to Waterworld is Jurassic Park. This is home to two extremely popular rides: Jurassic Park The Ride, which is a water ride, and the Flying Dinosaur, which is a fantastic upside-down roller coaster.

Next along is San Francisco, which is one of the smaller zones of the park. This is home to Backdraft, which is a simulation of the fire scenes in the movie Backdraft.

New York, which is where you will find the Amazing Adventures of Spiderman ride. This ride is a 3D experience of the world of Spiderman.

 The section houses rides like Mario Kart: Koopa's Challenge and Yoshi's Adventure, but with its careful attention to detail and cleverly designed interactive elements, the Super Nintendo World area is an attraction in and of itself.  Aside from the Nintendo-themed shops and eateries, the area also has a host of side quests and mini games for you to enjoy.

Take the JR Osaka Kanjo-sen (Osaka Loop Line) from JR Osaka Station to Nishikujo Station and switch to the JR Yumesaki Line to Universal-city Station. 

Exit Universal-city Station and follow the signs (and crowds) to Universal City and Universal Studios Japan. Universal City is a bunch of shops and restaurants located just before the entrance to Universal Studios Japan.