Much has been written about the yamabushi of the Dewa Sanzan mountains in Yamagata Prefecture, about two and a half hours north of Tokyo via bullet train. The yamabushi are followers of Shugendo, an ascetic mountain religion best thought of as an amalgamation of Shinto, Buddhism, Taoism, and mountain worship. Shrouded in secrecy and more than a little mystery, their ascetic practices might seem more like superhuman feats to the layperson: yamabushi famously commit to often physically grueling, spiritual practices of self-denial, like circumambulating mountains on straw sandals year-round, or meditating for hours under freezing waterfalls. Food might not seem of great importance while in pursuit of enlightenment, but it turns out that what you eat in your spiritual practice is just as important as your other activities.