waterfall meditation; ascetic practice under a waterfall
A traditional Shugendō or Buddhist ascetic practice where a person stands or chants under a cold waterfall for purification and spiritual training.
He does waterfall meditation in the mountains every morning.
Waterfall asceticism is one of the practices for purifying the mind and body.
Compound of 滝 (taki, 'waterfall') and 行 (gyō, 'ascetic practice'). The term refers specifically to the religious or spiritual practice of standing under a waterfall.