1.
pilgrimage, visiting sacred sites
A journey to visit a series of temples, shrines, or other sacred places, often following an established route.
2.
pilgrimage (anime/media), visiting real-life locations from fictional works
In modern usage, visiting real-world locations that appeared in anime, manga, films, or other media. Also called 聖地巡礼.
Cultural note
The most famous Japanese pilgrimage is the 四国八十八か所巡り (Shikoku 88 Temple Pilgrimage), a roughly 1,200 km route visiting 88 Buddhist temples associated with 弘法大師 (Kōbō Daishi).
Modern usage
聖地巡礼 ("sacred site pilgrimage") has become a major cultural phenomenon where fans visit real locations that appeared in anime, manga, or films. This has become a significant driver of regional tourism.