Walpurgis is the sixth studio album released by Aimer.

It was released on April 14, 2021 in a regular CD only edition and in three versions: a limited CD + BD edition (Type-A),[1] a limited CD + DVD edition (Type-B),[2] and a Limited Edition CD + 3 BD edition.

[3] In addition, Walpurgis is Aimer's first album to be available in LP format.

2 on Oricon's Weekly Album Chart dated April 26, 2021[7] and hit No.

1 on Billboard Japan's Hot Albums and Top Albums Sales Charts dated April 21, 2021.