Tokyopop licensed the series for English-language release in North America and published the eight volumes between April 23, 2002 and October 7, 2003. However, Tokyopop's license expired in August 2009; Dark Horse Comics is currently releasing it in omnibus format, beginning on March 24, 2010. Madman Entertainment distributes the series in Australia and New Zealand. The series is published in Hong Kong in Traditional Chinese by Jonesky, in Singapore in Simplified Chinese by Chuang Yi, in South Korea by Daiwon C.I., in France by Pika Édition, in Spain by Norma Editorial, in Mexico by Grupo Editorial Vid, in Italy by Star Comics (which serialized it in Express), in Germany by Egmont Manga & Anime, in Poland by Japonica Polonica Fantastica, in Brazil by JBC, and in Sweden by Carlsen Verlag.