xxxholic Trivia

• xxxHolic was serialized in Kodansha's Young Magazine periodically from 2003 until March 2010. It then moved to the Bessatsu Shōnen Magazine in June 2010 where it ended serialization in February 2011.
• A total of nineteen tankobon (that's the official name for the books) were published.
• A light novel and a video game have been released based on the series.

Giveaways Ahead!

• While Syaoran was able to go back in time at the cost of being imprisoned by the sorcerer Fei-Wang Reed, Watanuki was created to replace his presence in the natural timeline.
• As the series reaches its conclusion, Syaoran and Watanuki become trapped in a void by Fei-Wang and the two must pay a price to become free. Syaoran must forever travel through dimensions, never stopping, while Watanuki offers to stay inside the shop forever, and becomes the new owner, granting wishes until the day he can meet Yūko again. Although Watanuki is able to meet Yūko through a dream, he decides to continue waiting for her, although he has become able to leave the shop if he wants to.

Giveaways End

• xxxHolic was conceived when the group Clamp wanted to link the supernatural and fantasy series they made with a realistic one.
• The art style of the manga draws on the influence of ukiyo-e wood prints.
• When making a chapter composed of about twenty pages, Clamp takes around two days to make the artwork, the time differing with the ones from other series they made.
• The script of the series made by Nanase Ohkawa, who the other Clamp members ask her about any confusion they have before starting drawing the chapters. The illustrations and character designs are mainly done by Tsubaki Nekoi with assistance from Mokona although Satsuki Igarashi also draws various parts. Mokona is mainly in charge of designing the female characters, while Nekoi draws the male ones and all the spirits featured.
• For the series, Clamp decided to use Japanese and Chinese themes, but avoided using tones. 
• The artwork is also inspired by Alphonse Mucha who Mokona is a fan of. This leads to all the tankobon covers being gold or silver and then color printed over it.
• The series was retitled xxxHolic Rō ever since volume 16 because of how Watanuki replaced Yuko as the shop's owner. The Japanese word Rō basically means "cage" and aignifies the way Watanuki is kept in a "cage" himself.
•  Because Tsubasa: Reservoir Chronicle was more focused in action scenes, Clamp sometimes took breaks from xxxHolic or create autoconclusive stories so that the storyline between the two series would always be linked.
• xxxHolic was one of the first four manga series licensed for English release in North America by Del Rey Manga, and was acquired together with Mobile Suit Gundam SEED, Negima!: Magister Negi Magi, and Tsubasa: Reservoir Chronicle in January 2004.