Which animation studio produced the anime adaptation of "xxxHolic"?

The animation studio that produced the anime adaptation of xxxHolic is Production I.G. They were chosen to adapt the series due to their expertise in creating high-quality animation and their experience in producing other successful anime titles. With their skilled team, Production I.G brought xxxHolic to life through their unique art style and visually captivating storytelling, making it a popular and well-received adaptation among fans of the manga.