On February 10, secluded in Narushima in Japan's Gotō Islands, three elderly men in traditional attire quietly gathered for an important event marking the revival of the Christmas ritual known as "Odaya" or "the great night." Notably, three staffs were leaned against the entrance door, serving as a sign that a critical ceremony of the hidden Christians was taking place indoors, highlighting their cultural sensitivity and the importance of discretion in their practices. As these men sat on tatami mats, the ritual began with prayers invoking God and Santa Claus, using offerings of rice, sake, and fish—substitutes for bread and wine. The prayers, including phrases with Latin roots that have been orally passed down for centuries, reflect a blend of deeply-rooted traditions and the unique adaptations that hidden Christians have made to preserve their faith in a predominantly non-Christian society since the early 1600s. The prayers culminated in a profound moment where one participant invoked the birthplace of Jesus in Bethlehem, illustrating how these rituals are not only about celebration but also about maintaining a living connection to their historical roots. This revival of Christmas celebrations among hidden Christians in Japan not only underscores their resilience in preserving their faith but also highlights the ongoing significance of cultural heritage in a rapidly changing world.