Do not drink large amounts. While locals have used it for rituals, the high mineral content can upset your stomach. Bring a small vial if you want a sample—it makes for an unbelievable souvenir.
In the end, the “mystery” is solved not by finding a lost artifact, but by understanding the nature of the communities that created the term. The search for “CovertJapan Asuka and the Fountain of White Verified” is a search for a specific, unindexed piece of media, its meaning accessible only to those who know exactly where to look.