Hai! is the fourth and final album to be released by British duo The Creatures, composed of former Siouxsie and the Banshees members Siouxsie Sioux and Budgie. The album was recorded in two parts: the drums were recorded by Budgie and Kodo drummer Leonard Eto in Tokyo in August 2002 and the rest of the recording was done in Europe.
Mojo magazine praised the album at its release and rated it 4 stars: "Hai! boasts more than a few moments of jasmine-scented intimacy, where Sioux's inimitable Banshee yelp does daintily nuanced dances to Budgie's intricate marimba manipulations. A robust return".
The single "Godzilla!" included a B-side not present on the album, "Attack of the Supervixens", inspired by Russ Meyer's film Supervixens.