Seibu-en (西武園ゆうえんち, Seibuen Yuenchi) is an amusement park located near Tokyo in Tokorozawa, Saitama Prefecture.

It is just outside the Seibuen-yūenchi Station, which is also owned and operated by the Seibu Railway.

The park underwent a significant expansion and redesign for the 2021 season, focused around a Showa era themed marketplace, a Godzilla motion simulator attraction, and a children's area based on the work of Osamu Tezuka.

[1] The park charges a separate admittance fee for each attraction.

However, a one-day free ticket is available, which includes admission and unlimited rides on most attractions.