Kasho Zammaiyaho

...This is a type of magical art that shows the supernatural power that the ascetic monk has acquired through mountain training, and sword-crossing is one such act. Officially called the Kasei Sammaya method, after purifying himself through a self-defense technique, he imagines himself merging with the principal image of Acala, and becomes a being that can control fire and crosses the fire. In this way, the ascetic monk convinces the people that he has acquired the power of Acala, and by using this power he can manipulate spirits to locate the existence of evil gods and spirits that are the cause of disasters, and heals illnesses and removes disasters through incantations and other means, thereby working to remove the worries and troubles of the people in this world. ...

*Some of the terminology explanations that refer to the "Fire-Born Samaya Method" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…これは，修験者が山岳修行などによって体得した超自然力である験力を示す験術の一種で，刃渡りなどもその一連の行為である。正式には，火生三昧耶法といい，護身法によって自己を清浄にした後，本尊不動明王と合体したと観じ，みずからが火を統御しうる存在となって火を渡る。これによって，修験者は，みずからが不動明王の力を体得したことを民衆に納得させ，その力によって諸霊を操作して災厄の原因である邪神，邪霊の存在をつきとめ，加持祈禱などで治病，除災を行い，民衆の現世での不安，悩みの除去につとめたのである。…

※「火生三昧耶法」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報