Kawasemi, Steel roller coaster at Tobu Zoo Park in Minami, Saitama, Japan

Kawasemi is a steel roller coaster at Tobu Zoo Park in Minami, Saitama, with a track length of 755 meters and a maximum height of 31 meters. The ride reaches speeds of 85 kilometers per hour and is built without any inversions.

Kawasemi opened in March 2008 as the first roller coaster of Intamin's Ultra Coaster type. It replaced the Mount Rocky Coaster, an earlier ride on the same site at Tobu Zoo. Its 755 m layout reaches 31 m in height, with a first drop of 30 m at 67.4° and a top speed of 85 km/h.

The name comes from the Japanese word for kingfisher, a small bird famous for its swift movements and agility. This choice of name reflects the character of the ride.

Riders must be at least 1.10 m tall. The station sits in Tobu Zoo, a 10-minute walk or 5-minute shuttle bus ride from Tōbu-Dōbutsu-Kōen Station, a junction on the Tobu Skytree, Isesaki and Nikko lines. Two four-car trains run at once.

The ride uses a cable lift system instead of a traditional chain lift, making it faster and more efficient. This feature allows it to maintain higher speeds throughout the entire course.