Skyline Attractions is currently working with Great Coasters International, Inc. and Sanoyas Rides Corporation to refurbish Regina (レジーナ), a fan-favorite wooden roller coaster at Tobu Zoo Park in Saitama, Japan. The attraction originally opened in 2000 and features a unique layout built atop a small lake. The attraction ceased operation in 2019, but the thrilling ride will return in 2023 with a series of modifications and improvements. Peak among them is the addition of brand new trains, with a fleet of Great Coasters trains to allow for a smoother ride and reduced maintenance. Skyline is also involved in various other mechanical upgrades to the attraction.